Berlian Pink Star terjual dengan harga Rp. 1 Triliun

Berlian yang  dikenal sebagai Pink Star telah terjual dengan sebesar $ 83m (£ 52m) atau sekitar Rp. 1 triliun (1 US$ = Rp.13. 000) dalam sebuah lelang di Jenewa - sebuah pencapaian rekor harga tertinggi untuk batu permata. 

Berlian Pink Star memiliki ukuran  2.69cm dimensi  2.06cm (1,06 inci dengan 0,81 inci) dan telah berbentuk cincin. Pink Star dijual kepada Isaac Wolf,  pengusaha permata ternama di New York.

Tawaran yang menang melampaui $ 46.2m dibayar untuk berlian Graff pink tiga tahun lalu, yang setengah ukuran Pink Star.
Menurut juru lelang, "Berlian Pink Star Ini benar-benar luar biasa dan langka," kata Bennett."Sangat, sangat sedikit dari batu-batu ini pernah muncul di lelang."Butuh waktu dua tahun untuk memotong dan memoles berlian, yang memiliki berat 132,5 karat.Dalam kondisi selesai nya Pink Star adalah 59,60 karat, lebih berat dua kali lipat ukuran berlian di kelasnya.

Karat adalah pengukuran berat yang digunakan untuk batu permata dan satu karat adalah  0.2g (0,00705 ons). Sotheby telah menjual hampir $ 200 juta senilai perhiasan di lelang saat ini, rekor untuk satu lelang menurut perusahaan.

Sunrise Ruby berharga Rp. 396 Miliar

Ruby Sunrise merupakan salah satu batu termahal didunia dan mungkin paling mahal dibanding dengan batu akik lainnya diluar dari berlian. Dinamakan Ruby Sunrise terinspirasi dari puisi ternama sufi terkenal abad 13 Jalaludin Rumi.

Sunrise Ruby mempunyai berat 25.6 karat (5.1 gr), dan merupakan gemstone paling langka di dunia. Swiss Gemmological Institute menyatakan Ruby sunrise sebaga  "a unique treasure of nature" and praised its "well-proportioned cut, highly attractive colour and fine purity"
David Bennett, ketika diwawancarai di ruby, menyatakan "selama 40 tahun di industri perbatuan permata, ia belum pernah melihat ruby se istimewa ini."  Berdasarkan catatan Gubelin ," Ruby ini berasal dari Burma  "dari warnanya dalam  puisi Jalaludin Rumi  merah darah merpati, "

Ruby ini terjual dengan rekor harga US $ 30 juta atau sekitar Rp. 390 milyar pada Mei 2015 dalam suatu lelang  di Sotheby di Jenewa, Swiss yang dibeli oleh seorang pembeli yang tidak dikenal (anonim). Awalnya diperkirakan bernilai antara US $ 12 dan 18 juta sebelum lelang  dan penawaran dimulai pada  harga 11 juta franc Swiss atau US $ 11.800.000. Penawaran berlangsung sekitar 7 menit oleh seorang pembeli melalui telepon.  Ruby Sunrise telah melampaui pemegang rekor sebelumnya, yaitu , cincin Graff ruby, yang dijual seharga US $ 8,6 juta November 2014.

Cameos

"Since the late 1700s, Italian carvers have been in enamored by the figure of Cupid. Therefore we see all kinds of scenes depicted on classic cameos from Cupid and Venus together, to Cupid playing with goats-and often Cupid shooting an arrow. I believe that the ultimate love-god Eros is the most beautiful of all mythological gods and the most powerful. Through Eros' love, he inspires all living things to gain love-defeating mans wisdom and carefully laid plans."

From Diana Jarrett in her personal communication with collector/dealer Jan Campbell.

Several Victorian and more modern cupid cameos have hidden symbolism. Interpreting its secret message adds another element of enjoyment to cameo collecting. The Victorians were fond of sending covert sentimental messages hidden in flowers, gemstones, and cameo carvings. For example, a cupid riding a lion might mean "Love conquers all". The cupid in a cage would be construed to mean "Prisoner of Love" in our modern vernacular. And the cognoscenti understood that cupid portrayed in cameos might be as moody as the real lovers who gave and received cupid cameos.

Cupid, part of the Goddess of Love Venus' inner circle serves dual purposes of expressing tender affection for the living and paying tribute to the dead. Cupid may not always appear 'baby-like'-but may instead be portrayed like a winged youth.

On a piece of mourning jewelry, Cupid may be seen leaning against an urn or column. When someone is mourning in real life, people will often ask: "How are you holding up" So the image is quite literal with the leaning Cupid. When Cupid conveys sorrow, he is shown in a somber pose with a pensive facial expression. The cameo background is generally black onyx, or something dark, and the

piece may be mounted as a brooch, pendant, or locket.
From the book "Cameos: Old and New", 4th Edition, Originally written by Ann Miller, extensively updated by Diana Jarrett.

Chrysoberyls Gemstone

Color

Standard color light to medium yellow to yellowish green, greyish green, brown to yellow-brown to light blueish yellow to greenish but several other types have color effects:

Color change effect in Alexandrite is primarily red to green, depending on whether it is viewed in lamplight or daylight. These two colors were coincidentally the royal colors of the Russian Czars, hence its popularity in old Russia

Cat's eye Chrysoberyl is yellow to yellowish green; greyish green; brown to brownish yellow

Clarity

Non-phenomenal chrysoberyl is transparent to semi-transparent, comprising a range of colours.
The alexandrite variety contains gems that vary from transparent to semi transparent, and whose colour appears different depending on the light it is viewed in.
Cat's eye chrysoberyl is opaque to semi-transparent, containing minute parallel inclusions that cause chatoyancy.

Cut

Normal Chrysoberyls and alexandrites occur in a variety of standard cuts
Cat's eye chrysoberyl occurs in cabochon due to the nature of the effect (chatoyancy)

Treatment

No known treatments in significant numbers
One case known of brown cat's eye chrysoberyls in the 1990's which was irradiated in a nuclear facility to deepen the brown colors

Care

With excellent hardness and toughness, chrysoberyls of all types are extremely resilient for use in jewelry and may be worn under daily conditions.
Alexandrites and cat's eye chrysoberyls are quite rare to begin with and as such highly collectible due to their exotic, phenomenal qualities. A premium is placed on gems that contain strong colour change qualities, since with alexandrites a predominantly "muddy" mix of greens, browns and reds tends to be the norm, resulting in a vague colour change.
With cat's eyes, a strong, sharp and unwavering silvery line that is visible from girdle-to-girdle is highly desirable, accompanied by rich green, yellow or brown colours.

Chalcedony Gemstone

Color

Some of the most common types of chalcedony are:
Bloodstone: a dark green chalcedony with deep red spots
Agate: curved or angular-banded varieties of chalcedony
Chrysoprase: translucent to semi translucent, light to medium yellowish green
Onyx: larger slabs of straight parallel layers of different colors

 

 

Clarity

Chalcedony is a gem composed of cryptocrystalline (microscopic) quartz crystals that form in tightly interlocking, fibrous masses. All chalcedonys are semi-translucent to opaque but rarely will eye-clean cut stones be cut form it

Cut

Chalcedonies may be porous, so care must be taken not to immerse the gem in substances that could change its appearance
Use damp, soft cloth, or scrubbing with a soft-bristle toothbrush
Chalcedonies possess an extraordinary toughness, allowing them to be carved in large flat cabochons, intaglios, cameos, tablets or even plates or bowls. Idar-Oberstein, twin cities in Germany, have been known for developing the cutting and carving industry for this gem since the 1700s.

Treatment

Dyeing: chalcedony can be dyed in practically all colours, due to its porous nature. Much of the black chalcedony sold on the market is dyed black. In banded material, some bands may be dyed while others remain white.
Heating: some yellow to brown material may be heat treated to result in redder colours.

Care

Chalcedonies may be porous, so care must be taken not to immerse the gem in substances that could change its appearance. As with most gems, a damp, soft cloth, or scrubbing with a soft-bristle toothbrush, are the best ways to clean these two forms of quartz.
Chalcedony exhibiting unusual banding or landscape scenes are particularly prized, as are agates containing dramatic dendritic inclusions. Iris agates and fire agates exhibiting strong iridescent colours are also collected. Finally, carved chalcedony, such as intaglios or cameos, may be collectible if they have provenance that can be identified as typical of a certain era. Signed gems from a known lapidary artist are also collectible.

Beryls Gemstones

Color

Red: Bixbite, only found in one location in Wah Wah Mountains, Utah, USA

Bright yellow: Heliodor. If yellow becomes deep toward orange: "golden Beryl"

Colorless: Goshenite

Deep blue: only found on one location in Brazil: will quickly loose its color if expoed to daylight

Green: too light to be considered emeralds. Problematic as a green beryl is much cheaper than an emerald but sometimes still sold as one

Clarity

Considering the range of beryls clarity can vary from eye-clean to very included

Cut

Beryls may be cut several different ways, though emerald cut and oval cut gems tend to predominate

Treatment

Color: Heating can take out a secondary color rendering a deeper, more saturated color
Color: Sometimes colorless beryls are irradiated to produce yellow colours. This colour is considered stable. Maxixe beryl is almost always irradiated is often irradiated in a laboratory. Color is not stable. Some colourless and light pink beryl from Minas Gerais is irradiated to produce maxixe beryl
Clarity: colourless oil and resins are sometimes used to hide fissures in red beryl

Care

Beryls are generally quite hardy unless they are strongly includedRed beryls tend to be more like emerald in this respect and may be fragile if the gem has many surface reaching fissures. A dampened, non-abrasive cloth is best used to clean beryl jewelry.
Large beryls with high level of saturation
Rare beryls such as Red beryl
Special effects such as "cat's eye"
Borderline beryls: "is it an emerald or is it a green beryl"

Color

Different varieties: purple is a rare variety from Maine. Blue stones from Brazil with colors rivalling Paraiba tourmaline are most in demand
A light green variety of apatite carries the trade name "asparagus stone"
The recent availability of the neon blue-green variety from Madagascar has gained popularity

 

 

Clarity

Eye clean larger stones are quite common

Cut

Cabochon or creative cut by lapidary artists

Treatment

Color: Most apatites are heat treated to enhance color

Care

Apatites are delicate - especially when subjected to heat, temperature changes, changes in air pressure (such as in an airplane)
Dampened soft fabrics with no abrasive or chemical additives, or a soft bristle toothbrush doused with water
Not recommended to use in rings

Aquamarine Gemstone

Color

Main colors: greenish blue to blue green
Light in tone and transparent
Some milky quality if lots of inclusions
Most collectible colors: aquamarines that have saturated, light blue colours are especially desirable, though a few beryl collectors prefer a slight greenish tinge

Clarity

They frequently possess a vitreous clarity not found in emeralds. For this reason, aquamarines may be fashioned as exceptional clean gems and carvings
Lower grade aquamarines can have a milky appearance if the crystal has a lot of inclusions
a potentially desirable "cat's eye" effect occurs when miniscule, hollow growth tubes form parallel to one another

Cut

Relatively large stones can be cut due to its hardness and relatively large crystals (up to hundreds of carats) without inclusions
Unusually cut gems are also popular, especially in gems that have been fashioned by an important lapidary artist.
Aquamarines and other beryls often lend themselves to sculptures because of their size

Treatment

Consider every aquamarine heat treated
Heat treatment causes them to loose their secondary greenish color and create a more "aquamarine blue" gem
It is generally impossible to gemologically determine whether an aquamarine has been treated or not

Care

Aquamarine can be worn in jewelry under normal use. Larger aquamarines should be worn with care, especially in settings such as rings that can be easily knocked
Cleaning: sudsy water and damp cloth

Most collectible:

Saturated, light blue colours
Gems that have been fashioned by an important lapidary artist or cut in unusual ways
Aquamarines from desirable localities, such as Santa Maria aquamarines from Itabira, in Brazil, are collectible in accordance to their legendary depth-of-colour

Ametrine Gemstone

Color

In ametrine, a unique form of quartz mined from a single locality in Bolivia, the colours are both yellow and purple in areas of zoning

Clarity

Ametrine, just like most crystalline quartzes is often eye-clean

Cut

Ametrine can also be cut to blend the two colors so that the resulting stone is a mix of yellow, purple, and peach tones throughout the stone
Ametrine is most typically faceted in a rectangular shape with a 50/50 pairing of the two colors
Sometimes a checkerboard pattern of facets is added to the top to increase light reflection
Ametrine is also popular among artistic cutters and carvers

Care

Because the bi-coloured ametrine comes from only one mine in the world, it is sometimes collected if the depth of colour and the division of colour is strong, or if it has been skillfully or cleverly carved.

Amethyst Gemstone

Color

Transparent to translucent lilac to purple through bluish purple
A reddish purple colour-shift that is sometimes visible in incandescent light
In ametrine, a unique form of quartz mined from a single locality in Bolivia, the colours are both yellow and purple in areas of zoning. Such gems are sometimes cut in a way that mixes the colours, and at other times to show the division of colours

Clarity

Some amethysts have liquid inclusions containing solids and gases (water bubbles)
Some minerals suchas rutile and hematite can be found in amthyst as well

Cut

Amethyst can be found in many sizes and therefore offered in many different kinds of cuts and carvings
Many famous lapidaries (cutters) work with amethysts to make unusual carvings or cuts, which are also highly prized.
Bi-coloured ametrine has been skillfully or cleverly carved to emphasize the bi colored nature of the stone

Treatment

Amethysts are heat treated to improve an overly dark purple color or to get rid of the smoky color
Many amethysts in the market are synthetic. It is virtually impossible to differentiate the two

Care

Care should be taken not to knock the gem during use, as small fissures or cracks may develop, especially along facet junctions. It can be cleaned with warm, sudsy water or a dampened cloth. Some amethysts may lighten in tone over time upon prolonged exposure to bright light.
Collectors of amethyst look for depth of the purple colour with red flashes if the gem is cut conventionally. Many famous lapidaries (cutters) work with amethysts to make unusual carvings or cuts, which are also highly prized. Because the bi-coloured ametrine comes from only one mine in the world, it is sometimes collected if the depth of colour and the division of colour is strong, or if it has been skillfully or cleverly carved.

Amber Gemstone

Color

May be seen in yellow, orange and brown colours and rarely as blue and green.
Impurities and organic substances cause colours in amber.
Green and blue ambers are so perceived due to strong fluorescence in some amber from the Dominican Republic

Clarity

Amber often possess gas bubbles which vary in size and quantity within each piece. In the space between the bubbles, the resin is clear
The bubble inclusions actually interfere with the passage of light through the amber, resulting in the dilution and variation of color and opaqueness. For example, there are so many bubbles in milky amber, when examined under the microscope, it resembles sea foam – thus causing the solid milky color.

Cut

Most amber is fashioned as cabochons or rounded or free-form beads, and are rarely faceted

Treatment

Heating in oil causes some cloudy amber to clarify, or to produce darker amber colours
Amber is sometimes dyed to add a darker tone to lighter materials
Two factors that affect the color of amber is air and the actual tree source

Care

While rings using amber are used, the user must take special care
Avoid rough handling, heat and chemicals for all amber
They are soft, occasionally brittle, and porous enough to be attacked by acids
Cleaning may be performed using a dampened cloth or a moistened soft bristle toothbrush
Strong colours in amber are considered collector items, as is any amber containing unusual insects. Entomologists seeking to understand a bygone world often collect these amber samples for further study.

Alexandrite Gemstone

Color

The colour of alexandrite appears different depending on the light it is viewed in

Daylight: Yellowish, brownish, greyish or bluish green

Incandescent light: Orangy or brownish red to purplish red

The best stones are sometimes loosely described as "an emerald by day and an amethyst at night"

Clarity

The alexandrite variety contains gems that vary from transparent to semi transparent
In terms of clarity, alexandrite is comparable to ruby.
Clean faceted stones in sizes above one carat are rare and above 2–3 carats are extremely rare
Common inclusions are silk like rutile needles

Cut

alexandrites are found in a variety of shapes and cutting styles. Ovals are cushions are the most common

Treatment

Alexandrite is generally never treated to enhance its color or diminuish the appearance of inclusions

Care

Alexandrite is extremely resilient for use in jewellery and can be worn daily under normal circumstances
Most alexandrite can be cleaned in an ultrasonic cleaner and certainly with a damp cloth and warm soapy water
Alexandrite is one of the world‘s most expensive gems, with prices similar to those fetched by fine ruby or emerald because of their rarity and their exotic, phenomenal qualities. A combination of alexandrite and "cat's eye" is the most desirable.
A premium is placed on gems that contain strong colour change qualities, since with alexandrites a predominantly "muddy" mix of greens, browns and reds tends to be the norm, resulting in a vague colour change.

Daftar Gemstones

The 10 biggest diamonds in the world

“Sergio”, a black carbonado diamond from Brazil discovered in 1893, beats all its rivals for weight. These so-called black diamonds are rare and scientists are still in debate over their origins. There are some that believe these black diamonds come from outer space, having travelled to Earth as fragments of an ancient meteor. Sergio (Portuguese Carbonado do Sergio) is the largest carbonado and the largest rough diamond ever found. It weighs 3167 carats and was found in the State of Bahia in Brazil in 1895. Like other carbonados it is believed to be of meteoritic origin.

2. Cullinan Diamond

The Cullinan diamond is the largest non-carbonado and largest gem-quality diamond ever found, at 3106.75 carat (621.35 g, 1.37 lb) rough weight. About 10.5 cm (4.1 inches) long in its largest dimension, it was found on 26 January 1905, in the Premier No. 2 mine, near Pretoria, South Africa., and was named after the owner of the mine, Sir Thomas Cullinan. It was given as a gift to the King of the United Kingdom (Edward VII) and was taken to Amsterdam to be cut. Nine large stones and 96 stones were taken from the rough diamond, including the famous Star of Africa (Cullinan I) which is 530.2 carats and is now part of the Crown Jewels, inserted into the Sceptre with the Cross. The value of the Cullinan diamond has been estimated at $2 billion.

3. Excelsior Diamond

Found in 1893 in South Africa, this huge rock was cut into many smaller pieces. The largest gemstone cut from this famous diamond was only 69.68 carats, but many in the diamond industry believe that much larger diamonds could have been taken from the original stone. Intriguingly, another diamond of a similar weight (around 1,000 carats) could have been included in this list, but little is known about it: It’s a rare black diamond that has been called The Nameless. No-one seems to know where it came from or when it was discovered, so – for now – it remains a side-note. 

4. Star of Siera Leone

Star of Sierra Leone diamond was discovered by miners on February 14, 1972 in the Diminco alluvial mines in the Koidu area of Sierra Leone. It ranks as the third-largest gem-quality diamond and the largest alluvial diamond ever discovered.  This diamond has 968.9 carat (193.78 g)

On October 3, 1972, Sierra Leone's then-President, Siaka Stevens, announced that Harry Winston, the New York City jeweller, had purchased the Star of Sierra Leone for under $2.5 million.^[2]  The stone was initially cut into an emerald shaped stone weighing 143.2 carats (28.64 g) but was later re-cut due to an internal flaw,^[3] eventually resulting in 17 separate finished diamonds, of which 13 were deemed to be flawless. The largest single finished gem was a flawless pear-shaped diamond of 53.96 carats (10.792 g). Six of the diamonds cut from the original rough were later set by Harry Winston into the "Star of Sierra Leone" brooch.^[4] A rare characteristic of the stone is its perfect chemical purity: it is ranked as a type IIa diamond, a category which includes less than 1% of all diamonds.

5. Incomparable Diamond

At 890 carats (just over 6 oz) this Congolese rough diamond was discovered by a young girl in 1989. The smart child noticed the diamond in a pile of rubble and passed it on to her uncle, who sold it to diamond dealers. Like many of the world’s diamonds, it ended up at one point in the Belgian city of Antwerp, famous for its diamond district. It took experts years to cut the rough diamond into smaller gems, but they managed to create a beautiful yellow-brown stone weighing 407.48 carats that had been cut into an unusual triangular shape. Strangely enough, this fantastic gemstone actually appeared on eBay in 2002, but went unsold. 

6. The Woyie River Diamond

The Woyie River Diamond was recovered on 6 January 1945 from the Woyie River near Koidu in eastern Sierra Leone.^[1] The uncut stone weighed 770 carats (154 g),^[2] and at that time it was the largest alluvial diamond ever found, and the third largest diamond discovered in Africa, after the Cullinan Diamond and the Excelsior Diamond. The alluvial Star of Sierra Leone, discovered at the Diminco mine in Sierra Leone in 1970, is larger at 968.9 carats (193.78 g) uncut. 

The uncut Woyie River Diamond had a broadly lozenge shape, measuring 71 × 53 × 32 millimetres (2.8 × 2.1 × 1.3 in), with one unusually flat cleavage plane. The rough diamond was brought to London, where it was viewed by Queen Mary in October 1947 and then exhibited at the British Industries Fair in May 1949. The stone was cut by diamond cutters Briefel and Lemer in London (who also cut the Williamson pink diamond) into 30 gems weighing 282.36 carats (56.472 g) in total, including 10 of over 20 carats (4.0 g) each. The largest of the gems is the Victory Diamond which is weighs 31.35 carats (6.270 g) and is Emerald cut (occasionally described as "step cut").

7. Golden Jubilee Diamond

The Golden Jubilee Diamond is the largest cut and faceted diamond in the world. It weighs 545.67 carats (109.13 g). It outweighs the Cullinan I by 15.37 carats (3.07 g). The Golden Jubilee Diamond was discovered in the Premier Mine, which is also the origin of the Cullinan diamond (1905) and other notables such as the Taylor-Burton (1966) and the Centenary (1986). The Cullinan I, also known as the Great Star of Africa, had held the title of the largest cut and faceted diamond since 1908. The diamond is valued at 4–12 million US dollars.

The Golden Jubilee Diamond was cut from a large brown diamond of 755.5 carats (151 g), found in the prolific blue ground of the Premier Mine in South Africa in 1985. First known as the "Unnamed Brown," the Golden Jubilee was given to Gabriel Tolkowsky by De Beers for the purpose of testing special tools and cutting methods that had been developed for use on the colourless D-colour Centenary. Because of its deep cracks and several inclusions, the Golden Julilee Diamond was cut in a specially designed underground room free from vibrations. The yellow-brown diamond was transformed through a fire rose cushion cut. Until 1990, the diamond remained largely unknown to the outside world, requiring two years to bring it to its current state. The unnamed diamond was brought to Thailand by the Thai Diamond Manufacturers Association to be exhibited in the Thai Board of Investment Exhibition in Laem Chabang and was selected to herald De Beer's centennial celebrations in 1988. The Golden Jubilee was purchased from De Beers by a group led by Henry Ho of Thailand in 1995.

9. The Vargas Diamond

The Vargas Diamond, discovered in Brazil on August 13, 1938 by Joaquim Venancio Tiago and Manoel Miguel Domingues, was 726.6 carats (145.32 g) when pulled out of the ground. Twenty-nine smaller diamonds were carved from the larger rough Vargas Diamond including the 48.26-carat (9.652 g) 
This one was named for Getúlio Dornelles Vargas, who was the President of Brazil at the time. The diamond eventually found its way to Amsterdam and was finally bought by someone not only famous in jewelry circles, but who has also become synonymous with the industry as a whole: American jeweler, Harry Winston. Twenty-nine smaller stones were cut from this rock, with the largest being a flawless 44.17 carat gem which had been re-cut by Winston himself. The Vargas has 726.6 carats.

The Jonker Diamond

This giant gem, found in South Africa in 1934, was found by a settler called Johannes Jacobus Jonker, hence its unusual moniker. It’s believed the rough diamond was eventually cut into 13 smaller gemstones, with the largest diamond, the Jonker I, still weighing in at an incredible 142.9 carats. Diamonds are valued by weight, color, clarity and various other factors. However, with a colorless flawless diamond valued at $26,125 per carat, the Jonker I could be worth as much as $3.7 million!


 

Cara cepat mengeluarkan jarong Black Opal Kalimaya

Batu Black Opal salah satu  batu akik yang digemari dan banyak dicari penggemarnya. Selain harganya yang murah pada waktu (sebelum jarong)  batu yang banyak terdapat di wilayah Banten ini mulai dikenal ke mancanegara mengingat keunikan dari batu black opal ini. Harganya pun bervariasi dari yang puluhan ribu hingga mencapai puluhan juta rupiah.

 

 

Bagi anda yang mempunyai tabungan sedikit apabila ingin memiliki batu black opal atau kalimaya hitam, bisa membeli dalam bentuk bahan atau bongkahan, namun pastinya belum mengeluarkan jarong atau kembang.

Disini akan dibuka rahasia agar batu black opal keluar jarong dengan waktu yang sangat singkat, namun cara ini bisa saja gagal, oleh karena itu kami saranan anda mempunyai bahan black opal cadangan. Langsung saja.

Sediakan botol, isi dengan minyak zaitun kira-kira batu kalimaya sampai terendam lalu tutup rapat, selanjutnya botol yang sudah terisi minyak zaitun tersebut dimasukan kedalam oven sampai minyak yang ada didalam botol tersebut sangat panas, kira-kira sudah panas, keluarkan botol dari oven dan masukan batu black opal kedalam botol, tunggu sampai 15 menit dan angkat batu tersebut.

Cara ini sudah dilakukan oleh banyak orang dan berhasil atau black opal kalimaya telah berubah warna dari hitam hingga keluar jarong dengan waktu singat.  Untuk perhatian, sebaiknya batu yang dimasukan kedalam botol yang berisi minyak  zaitun sudah berbentuk batu cincin.

Demikian tip cara mewarat black opal yang bisa diinformasikan. Semoga tips ini bermanfaat. Selamat mencoba.

Mengenal dan merawat batu Bacan

Pulau Bacan adalah sebuah pulau yang terdapat di Kepulauan Maluku tepatnya di sebelah barat daya pulau Halmahera. Secara administratif pulau Bacan masuk ke dalam wilayah Kabupaten Halmahera Selatan provinsi Maluku Utara.
Di pulau Bacan inilah, Labuha, ibu kota Kabupaten Halmahera Selatan, terletak. Selain menjadi tempat ibu kota kabupaten, di pulau Bacan juga terdapat.

• Bandar udara Usman Sadik
• Keraton Sultan Bacan
• Benteng Bernevald (dibangun Portugis untuk menahan serangan Spanyol)
• Pantai Pawete
• Cagar alam
• Gunung Batusibela (2111 m dpl)
• Masjid Raya Bacan (berusia lebih dari satu abad)
• Makam beberapa sultan dan para ulama dari negeri Jiran.

Bagi kalangan pencinta batu mulia pulau bacan adalah pulau yang tidak asing lagi. Di pulau itu terdapat banyak mineral batu bacan. Batu Bacan kini telah menjadi batu mulia yang berharga tinggi dan mulai dikenal di mancanegara.

Batu bacan merupakan 'batu hidup' karena kemampuannya berproses menjadi lebih indah secara alami ataupun cukup dengan mengenakannya setiap hari dalam bentuk cincin, kalung, ataupun kepala sabuk. Batu bacan dengan inklusi atau serat batu yang banyak secara perlahan akan berubah menjadi lebih bersih (bening) dan mengkristal dalam waktu bertahun-tahun.

Sebagai contoh, batu bacan warna hitam secara bertahap mampu berubah menjadi hijau. Tidak cukup berproses sampai di situ, berikutnya batu ini masih bisa berubah lagi dalam proses 'pembersihan' sehingga menjadi hijau bening seperti air. Untuk mempercepat proses tersebut  biasanya pemilik batu bacan akan terus-menerus memakainya hingga berubah warnanya.

Meski pamor batu bacan menguat beberapa tahun belakangan di kalangan peminat batu mulia namun sebenarnya orang di kawasan empat kerajaan Maluku (Terante, Tidore, Jailolo, dan Bacan) sudah mengetahui jauh sebelumnya. Nama pulau penghasil batu bacan sendiri adalah Pulau Kasiruta. Akan tetapi, penisbahan nama bacan diawali dari tempat pertama kali batu itu diperdagangkan, yaitu Pulau Bacan yang tidak seberapa jauh jaraknya dari Pulau Kasiruta.

Batu Bacan memiliki sifat mampu 'hidup' berubah warna secara alami, dari beberapa jenis yang batu bacan juga  dapat menyerap senyawa lain dari bahan yang melekatinya. Seperti sebutir batu bacan hijau doko yang dilekatkan dengan tali pengikat berbahan emas mampu menyerap bahan emas tersebut sehingga bagian dalam batunya muncul bintik-bintik emas. 

Kemampuan dan keindahan dari batu Bacan yang dapat berubah warna secara alami itulah banyak membuat kagum  pecinta batu mulia di luar negeri seperti dari China, Arab, dan Eropa. Batu Bacan memiliki tingkat kekerasan batu 7,5 skala Mohs, kekerasan batu bacan hampir sama seperti  batu jamrud dan melebihi batu giok. Dengan keistimewaan dan keunggulan batu bacan itulah banyak pecinta batu mulia dari luar negeri memburunya sejak tahun 1994. Di Indonesia sendiri batu ini baru popular belakangan sejak 2005 dimana sekarang harganya sangat mahal serta kurang logis bagi orang awam.

Penambangan batu bacan sendiri di Pulau Kasiruta tidaklah mudah karena perlu penggalian tanah hingga lebih dari 10 meter. Penambang batunya perlu mencari di tanah terdalam demi mencari urat-urat galur batu bacan. Meski lebih identik dengan warna hijau, batu bacan sebenarnya memiliki ragam warna lain seperti kuning tua, kuning muda, merah, putih bening, putih susu, coklat kemerahan, keunguan, coklat, bahkan juga beragam warna lainnya hingga 9 macam.

Batu bacan diketahui telah menjadi perhiasan hampir setiap warga sejak masa empat kesultanan (Ternate, Tidore, Jailolo, dan Bacan) di Maluku Utara, baik itu oleh pria maupun wanita. Bahkan, batu bacan terbaik menjadi penghias mahkota para sultan yang masih ada hingga saat ini seperti pada mahkota Kesultanan Ternate. Sering pula batu ini menjadi hadiah bagi tamu yang menyambangi pulau-pulau di Maluku. Tahun 1960 saat Presiden Soekarno berkunjung ke Pulau Bacan dihadiahi warga di sana berupa batu bacan. Presiden SBY juga sempat menghadiahi Presiden Amerika Serikat, yaitu Barrack Obama berupa cincin batu bacan saat berkunjung ke Indonesia.

Apabila Anda menyambangi Ternate, Tidore, Jailolo, atau pun Pulau Bacan maka pastikan mendapatkannya untuk sebuah cenderamata. Akan tetapi, perlu kecermatan memilih atau mintalah saran orang yang memahaminya terkait keasliannya. Hindari pula membeli batu bacan 'mati' yang dibentuk jadi mata kalung atau mata cincin dimana terkadang batu tersebut tidak akan proses lagi.

Sebagai panduan singkat bahwa jenis batu bacan berkualitas yang umum dikenal dan beredar di pasaran ada dua, yaitu bacan doko dan bacan palamea. Bacan doko kebanyakan berwarna hijau tua sedangkan bacan Palamea berwarna hijau muda kebiruan. Nama palamea dan doko sendiri diambil dari nama desa di Pulau Kasiruta. Kedua desa tersebut memiliki deposit batu bacan cukup banyak selain di desa Imbu Imbu dan Desa Besori. Batu bacan sendiri merupakan jenis batu krisokola yang kebanyakan berwarna hijau kebiruan. Kekerasan awal batu ini berkisar antara 3-4 pada skala Mohs. Batu Bacan berkualitas adalah yang telah mengalami proses silisifikasi sehingga kekerasannya mencapai 7 pada skala Mohs. Batu bacan yang sudah memproses alami akan terlihat mengkilat dan keras ketika sudah diasah. 

Cara mengetahui keaslian batu Bacan

1. Gesekkan pada kaca. Batu bacan asli dapat menggores kaca ketika digesekkan.
2. Bakar. Saat dibakar, permukaan batu bacan asli akan terlihat seperti minyak dan akan hilang ketika dibersihkan. Sedangkan batu bacan palsu akan meninggalkan bekas yang tidak bisa dihilangkan.
3. Ditimbang. Timbang dua batu bacan dengan ukuran yang sama. Batu bacan yang lebih ringan kemungkinan besar adalah batu bacan palsu
4. Disenter. Saat disenter, batu bacan yang terkena cahaya akan terlihat serat-serat khas yang tidak mungkin ada pada batu bacan palsu.
5. Perhatikan perubahan batu. Batu bacan yang asli lama kelamaan akan berubah warna. Dari hitam, batu bacan akan berubah menjadi hijau dan seterusnya hingga menjadi batu yang berwarna bening.

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