mineral

Quartz Druzy Geode Fragment

Silicon Dioxide (SiO2)

Mohs hardness of 7, vitreous to sugary luster, hexagonal crystal system (trigonal), fine crystalline druzy surface, translucent white to greyish tint, specific gravity 2.65.

Identified July 24, 2026More mineral →

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Physical properties

Mohs hardness of 7, vitreous to sugary luster, hexagonal crystal system (trigonal), fine crystalline druzy surface, translucent white to greyish tint, specific gravity 2.65.

Formation & geological history

Formed via precipitation of silica-rich fluids within hydrothermal veins, rock cavities, or gas vesicles in volcanic or sedimentary host rocks over thousands to millions of years.

Uses & applications

Used primarily for lapidary arts, mineral specimen collecting, home decor, and crystal healing/metaphysical practices.

Geological facts

Druzy quartz forms when micro-crystalline quartz grows as a layer of tiny, sparkling crystals over the surface of another mineral matrix or geode wall.

Field identification & locations

Identified in the field by its characteristic glittery, sugary surface texture composed of countless tiny crystal faces. Common in geode-rich regions like Brazil, Uruguay, and parts of the Midwestern United States.