mineral
Tumbled milky quartz
Quartz (silicon dioxide, SiO₂)
AI-generated identification · may be incorrectLikely Mohs hardness 7, with a white-to-cream translucent appearance and vitreous to slightly waxy luster. Quartz has a trigonal crystal structure and no cleavage; the rounded shape is consistent with tumbling or natural abrasion.
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Physical properties
Likely Mohs hardness 7, with a white-to-cream translucent appearance and vitreous to slightly waxy luster. Quartz has a trigonal crystal structure and no cleavage; the rounded shape is consistent with tumbling or natural abrasion.
Formation & geological history
Quartz commonly crystallizes from silica-rich fluids in veins and cavities, or occurs in igneous and metamorphic rocks. Its formation may span many geological ages; the image alone cannot establish the specimen’s age or exact origin.
Uses & applications
Used in jewelry, carvings, and decorative collections; quartz also has extensive industrial uses in glassmaking and electronics.
Geological facts
Milky color results from tiny fluid or gas inclusions that scatter light.
Field identification & locations
Quartz is identified by its hardness, lack of cleavage, and glassy fracture; this rounded cream specimen is consistent with tumbled quartz. Quartz occurs worldwide, and the pictured piece is likely a common decorative specimen.
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