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GEMMOLOGICAL PROPERTIES
OPAL
Family: |
Mineraloid |
Crystal System: |
Amorphous |
Specific Gravity: |
2.15 |
Hardness: |
5.5 - 6.5 |
Refrative Index: |
1.450 |
Chemical Composition: |
SiO2H2O |
Birefringence: |
None |
Pleochroism: |
None |
Lustre: |
Subvitroeus - Waxy |
Fracture: |
Conchoidal |
Cleavage: |
None |
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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