Difference between revisions of "Template:Apatite"
From The Gemology Project
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| Habit || Prismatic | | Habit || Prismatic | ||
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− | | Cleavage || Imperfect | + | | Cleavage || Imperfect, basal |
|- | |- | ||
| Fracture || Conchoidal | | Fracture || Conchoidal |
Latest revision as of 10:29, 3 June 2007
Apatite | |
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Chemical composition | Ca5(PO4)3(F,Cl,OH) |
Crystal system | Hexagonal |
Habit | Prismatic |
Cleavage | Imperfect, basal |
Fracture | Conchoidal |
Hardness | 5 |
Optic nature | Uniaxial - |
Refractive index | 1.63-1.64 |
Birefringence | 0.003 |
Dispersion | Low, 0.013 |
Specific gravity | 3.2 |
Lustre | Vitreous |
Pleochroism | Weak |