mineral

Milky quartz

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

Hardness 7 Mohs; translucent white to pale gray, vitreous to greasy luster, hexagonal crystal structure, and indistinct cleavage with conchoidal fracture. The specimen appears massive and naturally fractured, with cloudy inclusions.

Identified September 14, 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; its age may range from recent hydrothermal growth to billions of years. Cloudiness commonly results from microscopic fluid inclusions or structural defects.

Uses & applications

Common quartz is used in glass, ceramics, abrasives, foundry materials, electronics, and engineered stone; attractive pieces are collected or used ornamentally, though this specimen is not gem-grade.

Geological facts

Quartz is among Earth’s most abundant minerals and is resistant to weathering, making it common in sand and sediment. Milky quartz is typically less transparent and valuable than clear rock crystal.

Field identification & locations

Identify by its glassy luster, lack of cleavage, conchoidal fracture, hardness sufficient to scratch glass, and often six-sided crystals; common worldwide in quartz veins, granites, and metamorphic rocks.