mineral
Tumbled milky quartz
Quartz (silicon dioxide, SiO₂)
AI-generated identification · may be incorrectLikely Mohs hardness 7; opaque white to pale gray with a vitreous-to-waxy polish and irregular internal inclusions. Quartz has a trigonal crystal structure and no cleavage; this rounded shape appears mechanically tumbled.
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Physical properties
Likely Mohs hardness 7; opaque white to pale gray with a vitreous-to-waxy polish and irregular internal inclusions. Quartz has a trigonal crystal structure and no cleavage; this rounded shape appears mechanically tumbled.
Formation & geological history
Quartz crystallizes from silica-rich fluids or melts in many geological settings; its age depends on the host deposit. Tumbling is a modern finishing process, not a natural formation feature.
Uses & applications
Used for inexpensive jewelry, ornaments, and mineral collections; quartz is also important 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
The white color, glassy polish, and hardness are consistent with quartz, though the image alone cannot confirm identification. Found worldwide; this small tumbled piece would typically sell for about $1–$10.
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