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GEMMOLOGICAL PROPERTIES
Alexandrite
Family: |
Chrysoberyl |
Crystal System: |
Orthorhombic |
Specific Gravity: |
3.5 - 3.84 |
Hardness: |
8.5 |
Refractive Index: |
1.745 |
Chemical Composition: |
BeAl2O4 |
Birefringence: |
0.008 - 0.011 |
Pleochroism: |
Strong: X = Red-Purple; |
Lustre: |
Vitreous-Adamantine |
Fracture: |
Uneven, Conchoidal |
Cleavage: |
110 - Distinct |
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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