Groene Apatiet 7.9x8.0x3.0 mm 1.27 CT. Trilliant Color: green Shape: Trilliant Weight: 1.27 CT. Size: 7.9x8.0x3.0 mm Clarity: SI1 Luster: Incredible Hardness: 5 Specific Gravity: 3.1 - 3.2 Refractive Index: 1.63 - 1.64 Chemical Composition: Ca5(PO4)3(OH,F,Cl), Calcium (Fluoro, Chloro, Hydroxyl) Phosphate Crystal Structure: Hexagonal Treatment: None