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GEMMOLOGICAL PROPERTIES
Beryl
Family: |
Beryl |
Crystal System: |
Hexagonal |
Specific Gravity: |
2.63 - 2.91 |
Hardness: |
7.5 - 8 |
Refractive Index: |
1.567-1.590 |
Chemical Composition: |
Be3Al2(SiO3)6 |
Birefringence: |
0.005 - 0.009 |
Lustre: |
Vitreous |
Fracture: |
Conchoidal |
Cleavage: |
Poor |
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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