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GEMMOLOGICAL PROPERTIES
Apatite
Family: |
Apatite |
Crystal System: |
Hexagonal |
Specific Gravity: |
3.2 |
Hardness: |
5 |
Refractive Index: |
1.63-1.64 |
Chemical Composition: |
Ca5(PO4)3(F,Cl,OH) |
Birefringence: |
0.002 - 0.004 |
Pleochroism: |
Dichroic |
Lustre: |
Vitreous |
Fracture: |
Conchoidal |
Cleavage: |
Imperfect |
This gemmological data has been provided by an external consultant. If you notice any errors or omissions - or if you would like to offer a suggestion to improve this service - please contact: webmaster@ajtd.com.au |
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