mineral

Clear quartz crystal (likely tumbled or naturally worn)

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Mohs hardness 7; colorless to translucent with vitreous luster, conchoidal fracture, and a trigonal crystal structure. The rounded shape appears polished, water-worn, or naturally broken rather than showing strong crystal faces.

Identified August 17, 2026More mineral →

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Physical properties

Formation & geological history

Forms in igneous, metamorphic, and hydrothermal environments when silica-rich fluids crystallize; quartz is common from Precambrian rocks through the present. Exact locality and age cannot be determined from the image.

Uses & applications

Used in glassmaking, electronics, abrasives, foundry materials, and watches; clear attractive pieces are sold as decorative or metaphysical specimens. This small piece has modest commercial value.

Geological facts

Quartz is one of Earth’s most abundant minerals and is notably resistant to weathering, allowing it to accumulate in sand and stream gravels.

Field identification & locations

Identify by its glassy appearance, lack of cleavage, hardness sufficient to scratch ordinary glass, and typically six-sided crystals when faces are preserved. Common worldwide, especially in granite, pegmatites, veins, and quartz-rich sediments.