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 of 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 of a beautiful deep blue, sometimes bluish white to azure blue, is characteristic.

An old handwritten label (early 20th century) is attached.

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