Blue Apatite

Blue apatite from Myanmar (Burma) is strongly dichroic, and shows colorless or blue when viewed from different directions. Fibrous blue apatite from Burma and Sri Lanka may be cut en cabochon to show a cat’s eye effect.

Occurrence

Apatite is an abundant mineral, found in many types of rocks. However, most gem-quality material is associated with pegmatites. Chatoyant stones are also found in Brazil, along with yellow, blue, and green varieties. Other localities include the Kola Peninsula (Russia), Canada, East Africa, Sweden, Spain, and Mexico.

Apatite Properties

• Specific Gravity: 3.20
• Refractive Index: 1.63-1.64
• Birefringence (DR): 0.003
• Luster: Vitreous
• Crystal Structure: Hexagonal
• Composition: Calcium phosphate
• Hardness: 5

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Birthstone

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