mineral

Quartz-bearing rock, possibly milky quartz or quartzite

Quartz (SiO₂), potentially quartzite if metamorphosed

AI-generated identification · may be incorrect

Whitish to pale tan, translucent grains, vitreous to sugary luster, and irregular fracture; quartz hardness is Mohs 7, with no cleavage and specific gravity about 2.65. The small specimen appears granular and weathered, so exact identification is limited from the image.

Identified August 30, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich fluids or magma; quartzite forms when sandstone is metamorphosed and recrystallized. Formation ages vary widely, from Precambrian to recent hydrothermal deposits.

Uses & applications

Common quartz is used in glass, ceramics, abrasives, electronics, and engineered stone; attractive pieces are collected or used decoratively. Quartzite is widely used as durable building and paving stone.

Geological facts

Quartz is one of Earth’s most abundant minerals and is piezoelectric, producing an electrical response when mechanically stressed.

Field identification & locations

Look for glassy luster, hardness that scratches ordinary glass, and absence of cleavage; quartzite typically shows interlocking grains and breaks across grains. Common localities include hydrothermal veins, granite-rich terrains, and metamorphic belts worldwide.