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Gemstone Cabochons Ma - Mar |
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Magnesite Cabochons |
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Often called Wild Horse Turquoise, Magnesite is not really turquoise but a mixture of Magnesite and hematite. Discovered fairly recently in the 1990's in southern Arizona in the Gila wilderness area it is a beautiful and popular stone. This stone is characterized by its creamy white color against a darker matrix of which can be red, brown, green, or black. The black variety is known as White Buffalo. It is also known as Viper Jasper Click on image for details |
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 Item 2068 |
 Item 1339 |
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Malachite Cabochons |
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Is easily recognized by it’s bands of light and dark green which are formed in stalactites it’s massive carvable form is well known. There is a much rarer crystalline form which is chatoyant. Malachite pseudomorphs the mineral azurite, replacing the original material, when this process is incomplete it results in azurite-malachite. Azurite-malachite has patches of both the dark blue azurite and the green malachite. Click on image for details |
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 Item 2075 |
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Marcasite Cabochons |
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Marcasite is a very heavy metallic mineral that is sometimes found in an agate matrix as in Marcasite from Nipomo, California. Marcasite in agate polishes like agate and makes wonderful jewelry. Marcasite has the same chemical formula as Pyrite, but crystallizes in a different crystal system, thereby making it a separate mineral. Often mislabeled because the difference is not apparent without complex analysis. Click on image for details |
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 Item 1372 |
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