mineral
Milky quartz
Quartz (silicon dioxide, SiO₂)
AI-generated identification · may be incorrectTypically white to translucent with a vitreous-to-waxy luster and irregular fracture; hardness 7 Mohs, no cleavage, trigonal crystal structure, and specific gravity about 2.65. The specimen appears granular or massive rather than showing distinct crystals.
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Physical properties
Typically white to translucent with a vitreous-to-waxy luster and irregular fracture; hardness 7 Mohs, no cleavage, trigonal crystal structure, and specific gravity about 2.65. The specimen appears granular or massive rather than showing distinct crystals.
Formation & geological history
Forms when silica-rich fluids crystallize in veins, cavities, and igneous or metamorphic rocks; its cloudy appearance results from microscopic fluid inclusions or fractures. Quartz occurs from Precambrian rocks to modern hydrothermal deposits.
Uses & applications
Used in glass and ceramics, abrasives, electronics, engineered stone, and as a gemstone or mineral specimen; this small rough piece has mainly educational or collecting value.
Geological facts
Quartz is one of Earth’s most abundant minerals and has piezoelectric properties. Milky quartz commonly lacks the transparency and crystal definition of high-grade clear quartz.
Field identification & locations
Identify it by its white translucency, glassy shine, hardness sufficient to scratch ordinary glass, and lack of cleavage; common localities include hydrothermal veins and granitic or metamorphic terrains worldwide.
