Description

Superb specimen showing good blue automorphic and bipyramid crystals of lazulite in a quartzite gangue (metamorphosed sandstone) and coming from Graves Mountains in Georgia, USA. Lazulite is a metamorphic mineral of silica-rich aluminous rocks (quartzites), associated with kyanite and rutile. It is also a hydrothermal mineral found in high-temperature veins and pegmatites. The rare crystals are bipyramidal specimens, but lazulite usually occurs in micrograined masses of up to decimeter size. Translucent or opaque, its color is a beautiful deep blue, sometimes bluish white to azure blue.

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