mineral

Milky quartz

Quartz (silicon dioxide, SiO₂), massive variety

AI-generated identification · may be incorrect

Typically white to translucent with a vitreous-to-waxy luster, uneven fracture, and no cleavage; Mohs hardness 7, trigonal crystal structure, and specific gravity about 2.65. The specimen appears massive and may contain minor iron-oxide staining or darker inclusions.

Identified September 4, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich fluids fill fractures and cavities, commonly in hydrothermal veins and pegmatites; individual pieces may be geologically old, from Precambrian to younger rocks. Exact age and locality cannot be determined from the photograph.

Uses & applications

Used as a source of silica for glass, ceramics, abrasives, and engineered stone; attractive pieces are collected or used decoratively, though this specimen is not gem-grade.

Geological facts

Quartz is one of Earth’s most abundant minerals and is resistant to weathering, allowing it to accumulate in sands and gravels. Milky appearance results from microscopic fluid inclusions, fractures, or mineral impurities scattering light.

Field identification & locations

Identify it by its white translucent appearance, hardness sufficient to scratch ordinary glass, lack of cleavage, and conchoidal or uneven fracture. Common worldwide in quartz veins, granite, pegmatite, and metamorphic terrains.