$Raw milky quartz (Quartz (silicon dioxide, SiO₂), likely included or fractured massive quartz) — mineral$

mineral

Raw milky quartz

Quartz (silicon dioxide, SiO₂), likely included or fractured massive quartz

AI-generated identification · may be incorrect

Hardness 7 Mohs; translucent white to gray, vitreous to pearly luster, no cleavage, conchoidal fracture, hexagonal crystal structure, and specific gravity about 2.65. The layered, fibrous-looking surfaces may reflect fracture or mineral inclusions rather than true crystal faces.

Identified August 19, 2026More mineral →

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Physical properties

Formation & geological history

Quartz commonly crystallizes from silica-rich hydrothermal fluids and pegmatites, or fills fractures in igneous and metamorphic rocks. Its formation age cannot be determined from the photograph and may range from Precambrian to recent.

Uses & applications

Used for glass, ceramics, abrasives, engineered stone, electronics, and ornamental objects; attractive translucent pieces are collected or cut for cabochons.

Geological facts

Milky appearance is caused mainly by microscopic fluid inclusions, fractures, or mineral impurities. Quartz is one of Earth’s most abundant and chemically durable minerals.

Field identification & locations

Identify it by its glassy translucence, lack of cleavage, conchoidal fracture, and ability to scratch ordinary glass; a steel file should not scratch it. Common locations include hydrothermal veins, pegmatites, granite regions, and quartz-rich gravel deposits.