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GEMMOLOGICAL PROPERTIES
Chalcedony
Family: |
Quartz |
Crystal System: |
Microcrystalline |
Specific Gravity: |
2.58 - 2.61 |
Hardness: |
7 |
Refractive Index: |
1.530 - 1.550 |
Chemical Composition: |
SiO2 |
Birefringence: |
+0.009 |
Pleochroism: |
None |
Lustre: |
Dull, Waxy |
Fracture: |
Conchoidal, Uneven, Splintery |
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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