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Name Origin | Kammererite is named after A. Kammerer, the mining director at St. Petersburg. |
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Chemical Formula | (Mg, Cr)6(AlSi3)O10(OH)8 |
Color | Red to purplish red, cranberry red |
Hardness | 2 - 2.5 on Mohs Scale |
Crystal System | Triclinic; crystals hexagonal shape, bounded by steep sided pyramids. |
Cleavage | perfect basal cleavage; micaceous; laminae flexible |
Specific Gravity (SG) | 2.64 |
Pleochroism | Strong; violet/hyacinth-red |
Luster | Vitreous; pearly on cleavages |
Stone sizes |
No gem cut from the U.S.S.R material; however, the Swakopmund have been cut, with gems up to about 5 carats possible. These are a lovely blue-green color, are relatively easy to cut, and hard enough to wear. |
Note: Kammererite is a beautiful but rare mineral. It is micaceous; consequently, it is extraordinarily difficult to facet, which has severely limited the availability of cut gems. It would have to handled with great care to avoid cleaving. A few clean, well-cut gems do exist.
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Euxenite
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Ruby
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Emerald
Amber
Wulfenite
Leucite
Magnesite
Inderite
Herderite
Gypsum
Gadolinite
Euxenite
Ekanite
Dolomite
Calcite
Ruby
Algodonite
Andalusite
Bornite
Chert
Chrysocolla
Crocoite