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GEMMOLOGICAL PROPERTIES
Zircon
Family: |
Garnet |
Crystal System: |
Tetragonal |
Specific Gravity: |
3.9 - 4.7 |
Hardness: |
6.5 - 7.5 |
Refractive Index: |
A Axis: 1.78-1.85; |
Chemical Composition: |
ZrSiO4 |
Birefringence: |
A: 0.0-0.008; |
Pleochroism: |
Weak |
Lustre: |
Vitreous-Adamantine |
Fracture: |
Uneven, Conchoidal |
Cleavage: |
Indistict |
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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