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