mineral
Tumbled milky quartz
Quartz, SiO₂; trigonal crystal system
AI-generated identification · may be incorrectHardness 7 Mohs; white to gray, translucent, with a vitreous-to-greasy luster. The rounded surface obscures natural crystal faces; quartz has no cleavage and uneven fracture.
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Physical properties
Hardness 7 Mohs; white to gray, translucent, with a vitreous-to-greasy luster. The rounded surface obscures natural crystal faces; quartz has no cleavage and uneven fracture.
Formation & geological history
Quartz crystallizes from silica-rich fluids and melts in many rock types; milky appearance comes from microscopic fluid or gas inclusions. Quartz formed throughout geological time, and this piece has been mechanically tumbled and polished.
Uses & applications
Commonly used in jewelry, ornaments, and collections; quartz also has major industrial uses in glassmaking and electronics.
Geological facts
Quartz is one of Earth’s most abundant minerals and occurs in igneous, sedimentary, and metamorphic rocks.
Field identification & locations
Look for hardness near 7, glass-scratching ability, and absence of cleavage; milky quartz is widespread in veins and many regions worldwide. Its smooth oval shape indicates processing rather than natural crystal growth.
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Undetermined; the image is too blurry for reliable identification
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