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GEMMOLOGICAL PROPERTIES
Turquoise
Family: |
Phosphate Minerals |
Crystal System: |
Triclinic |
Specific Gravity: |
2.6-2.9 |
Hardness: |
5.0 - 6.0 |
Refractive Index: |
1.610 |
Chemical Composition: |
CuAl6(PO4)4(OH)8·4H2O |
Birefringence: |
+0.040 |
Pleochroism: |
None |
Lustre: |
Waxy to Sub Vitreous |
Fracture: |
Conchoidal |
Cleavage: |
None Usually |
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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