mineral

Milky quartz

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

Hardness 7 Mohs; white to translucent, vitreous-to-waxy luster, crystalline trigonal structure, no cleavage, conchoidal fracture, specific gravity about 2.65. The cloudy appearance comes from microscopic fluid inclusions, fractures, or impurities.

Identified September 17, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich fluids crystallize in veins, cavities, and igneous or metamorphic rocks; specimens may range from ancient Precambrian to younger deposits. Commonly associated with granite, pegmatite, hydrothermal veins, and quartzite.

Uses & applications

Used for glass, ceramics, abrasives, electronics, and engineered stone; attractive pieces are collected or used decoratively. This rough specimen has modest commercial value.

Geological facts

Quartz is one of Earth’s most abundant minerals and is piezoelectric. Milky quartz can grade into rose quartz, rock crystal, or massive vein quartz depending on inclusions and transparency.

Field identification & locations

Identify it by its glassy sheen, lack of cleavage, conchoidal fracture, and ability to scratch ordinary glass. Common localities include Brazil, Madagascar, the United States, Switzerland, and many granite-bearing regions.