Lazulite
Notizie: Lazulite (MgAl2(PO4)2(OH)2 is a blue, phosphate-based mineral containing magnesium, iron, and aluminium phosphate. Lazulite forms one endmember of a solid solution series with the darker iron rich scorzalite. It forms by high grade metamorphism of high silica quartz rich rocks and in pegmatites. It is considered a semi-precious gemstone. It is often confused with lazurite, lapis lazuli or azurite. Lazulite crystallizes in the monoclinic system with prismatic crystals, although it is usually massive in form. It has a Mohs hardness of 5.5 to 6 and a specific gravity of 3.0 to 3.1. It is infusible and insoluble. It is found in Salzburg, Austria; Zermatt, Switzerland; Minas Gerais, Brazil; Lincoln County, Georgia; Inyo County, California; the Yukon in Canada, and elsewhere. It was first described in 1795 for deposits in Austria. Its name comes from the Arabic for heaven.
Stato: Israel Anno: 2012 |
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Stato: Switzerland Anno: 1961 |
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