mineral
Quartz (likely druzy quartz)
Quartz, silicon dioxide (SiO₂)
AI-generated identification · may be incorrectWhite to translucent, glassy luster with a sugary coating of tiny crystals; Mohs hardness 7, no cleavage, conchoidal fracture, and a hexagonal crystal structure. The cream-colored outer material may include iron-stained quartz or a carbonate matrix.
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Physical properties
White to translucent, glassy luster with a sugary coating of tiny crystals; Mohs hardness 7, no cleavage, conchoidal fracture, and a hexagonal crystal structure. The cream-colored outer material may include iron-stained quartz or a carbonate matrix.
Formation & geological history
Likely formed when silica-rich hydrothermal fluids deposited quartz in a cavity or on a host rock; the specimen appears natural but may be broken from a larger formation. Exact geological age and locality cannot be determined from the image.
Uses & applications
Common quartz is used in glass, ceramics, abrasives, electronics, and countertops; attractive druzy specimens are sold for mineral collecting and occasionally jewelry.
Geological facts
Druzy quartz consists of many microscopic quartz crystals coating a surface, producing a sparkly sugar-like texture. Quartz is one of Earth’s most abundant and chemically durable minerals.
Field identification & locations
Identify it by its hardness, glassy sparkle, lack of cleavage, and inability to scratch it with a steel knife while it can scratch ordinary glass. Common worldwide, especially in hydrothermal veins and geodes.
