mineral
Tumbled milky quartz (possibly iron-stained)
Quartz, silicon dioxide (SiO₂)
AI-generated identification · may be incorrectHardness 7 Mohs; white to translucent with brown staining, vitreous luster, and a hexagonal crystal structure. The rounded shape and smooth surface indicate tumbling; no distinct cleavage.
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Physical properties
Hardness 7 Mohs; white to translucent with brown staining, vitreous luster, and a hexagonal crystal structure. The rounded shape and smooth surface indicate tumbling; no distinct cleavage.
Formation & geological history
Quartz commonly crystallizes from silica-rich fluids in veins and igneous or metamorphic rocks. Its geological age cannot be determined from the image; the specimen was likely naturally weathered and then mechanically tumbled.
Uses & applications
Used in jewelry, ornaments, and collections; quartz also has broad industrial uses in glass and electronics.
Geological facts
Quartz is one of Earth’s most abundant minerals and resists weathering, so it often accumulates in river gravels and beaches.
Field identification & locations
A hardness test (it can scratch glass) and lack of cleavage help identify quartz; brown areas may be iron-oxide staining. Similar tumbled pieces are common in rock shops worldwide.
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Undetermined; the image is too blurry for reliable identification
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