mineral

Quartz-rich rock, possibly milky quartz or quartzite

Quartz (SiO₂), likely with minor iron-oxide or feldspar inclusions

AI-generated identification · may be incorrect

White to gray, translucent, vitreous to slightly sugary luster; uneven fracture and no obvious cleavage. Quartz has Mohs hardness 7 and specific gravity about 2.65; the specimen appears rough and naturally weathered.

Identified August 24, 2026More mineral →

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Physical properties

Formation & geological history

Likely formed by silica crystallization in a hydrothermal vein or by metamorphism of quartz-rich sandstone; its precise age and origin cannot be established from the photograph alone.

Uses & applications

Common quartz is used in glass, ceramics, abrasives, electronics, and engineered stone; attractive pieces are sold as inexpensive mineral specimens.

Geological facts

Quartz is one of Earth’s most abundant minerals and commonly forms distinctive six-sided crystals, though this specimen appears massive rather than well crystallized.

Field identification & locations

Test hardness against glass or a steel tool—quartz should scratch glass and resist scratching by steel; inspect for conchoidal fracture and possible feldspar or mica grains. Common worldwide, especially in hydrothermal veins and quartz-rich metamorphic rocks.