mineral

Quartz-rich rock, likely milky quartz or quartzite

Quartz (SiO₂), possibly quartzite if metamorphically recrystallized

AI-generated identification · may be incorrect

White to cream, translucent grains with a vitreous to sugary luster; quartz has Mohs hardness 7, no cleavage, conchoidal fracture, and specific gravity about 2.65. The granular texture suggests quartzite or a quartz-rich vein fragment rather than a single crystal.

Identified August 15, 2026More mineral →

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Physical properties

Formation & geological history

Quartz commonly crystallizes from silica-rich hydrothermal fluids in veins; quartzite forms when sandstone is metamorphosed and recrystallized. Exact geological age and origin cannot be determined from the photograph.

Uses & applications

Used in glass, ceramics, electronics, abrasives, engineered stone, and construction aggregate; attractive pieces may be collected as mineral specimens.

Geological facts

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

Field identification & locations

Identify by its hardness, lack of cleavage, glassy appearance, and inability to scratch it with a steel knife; quartz should scratch glass. A streak test is white, and acid produces no reaction. Common worldwide, especially in hydrothermal veins and quartz-rich metamorphic terrains.