mineral
Milky quartz
Quartz (silicon dioxide, SiO₂)
AI-generated identification · may be incorrectWhite to translucent, massive and irregular, with a vitreous-to-dull luster; Mohs hardness 7, trigonal crystal structure, no cleavage, and conchoidal fracture. The image suggests quartz, though exact identification is uncertain from appearance alone.
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Physical properties
White to translucent, massive and irregular, with a vitreous-to-dull luster; Mohs hardness 7, trigonal crystal structure, no cleavage, and conchoidal fracture. The image suggests quartz, though exact identification is uncertain from appearance alone.
Formation & geological history
Forms when silica-rich fluids crystallize in veins and cavities, or from silica-rich melts; quartz occurs in rocks of many geological ages and settings.
Uses & applications
Used in glassmaking, ceramics, electronics, and construction aggregate; attractive pieces are collected or sometimes cut and polished.
Geological facts
Milky color comes from tiny fluid or gas inclusions that scatter light.
Field identification & locations
Look for hardness sufficient to scratch glass, lack of cleavage, and a glassy fracture; common worldwide in quartz veins and many igneous, metamorphic, and sedimentary rocks.
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Granite (Phaneritic intrusive igneous rock)
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