Ammolite
From The Gemology Project
Revision as of 02:09, 29 October 2006 by Africanuck (talk | contribs)
Ammolite | |
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Chemical composition | CaC03 with trace elements |
Crystal system | Orthorhombic |
Habit | Fractured and non-fractured flat layers |
Fracture | Parting along layers |
Hardness | 3.5 |
Refractive index | 1.525 - 1.670 |
Birefringence | 0.135 - 0.145 |
Specific gravity | 2.60 - 2.85 |
Lustre | Vitreous to resinous |