Difference between revisions of "Lapis Lazuli"
From The Gemology Project
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+ | [[Image:Lapis-pyrite.JPG|left|framed|Lapis Lazuli with Pyrite inclusions]]<br clear="left" /> |
Revision as of 07:43, 11 December 2006
Lapis Lazuli | |
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Chemical composition | rock consisting of lazurite, hauyne, calcite and pyrite |
Habit | aggregate |
Fracture | uneven |
Hardness | 5.5 |
Refractive index | 1.500 - 1.670 |
Specific gravity | 2.50 - 3.00 |
Lustre | resinous to vitreous |