mineral

Quartz-rich rock, likely milky quartz

Quartz (SiO₂), possibly with minor feldspar or other inclusions

AI-generated identification · may be incorrect

Pale white to translucent, uneven and weathered surface with a vitreous-to-dull luster. Quartz has Mohs hardness 7, a trigonal crystal structure, no cleavage, and specific gravity about 2.65; the image alone does not establish the specimen’s exact composition.

Identified October 10, 2026More mineral →

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Physical properties

Formation & geological history

Quartz commonly crystallizes from silica-rich fluids in veins and pegmatites, or occurs as grains in other rocks; its age depends on its geological setting and cannot be determined from the image.

Uses & applications

Quartz is used in glassmaking, electronics, abrasives, and decorative objects; this small, unpolished specimen has little apparent commercial value.

Geological facts

Quartz is one of Earth’s most abundant minerals and commonly survives weathering because it is relatively hard and chemically resistant.

Field identification & locations

A hard, glassy appearance and lack of cleavage are useful clues; a scratch test on an inconspicuous spot can help distinguish quartz from softer minerals. Quartz occurs worldwide in veins, igneous rocks, and sediments.