mineral
Quartz crystal fragment
Quartz (silicon dioxide, SiO₂)
AI-generated identification · may be incorrectLikely a small, rough, translucent-to-white quartz fragment with a vitreous luster and uneven fracture. Quartz has Mohs hardness 7, a trigonal crystal structure, no cleavage, and specific gravity about 2.65.
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Physical properties
Likely a small, rough, translucent-to-white quartz fragment with a vitreous luster and uneven fracture. Quartz has Mohs hardness 7, a trigonal crystal structure, no cleavage, and specific gravity about 2.65.
Formation & geological history
Quartz crystallizes from silica-rich magma and hydrothermal fluids, and also occurs in veins and sedimentary deposits. The pictured fragment cannot be dated; quartz formed across many geological periods.
Uses & applications
Quartz is used in glassmaking, electronics, construction, and jewelry; clear or well-formed crystals are collected.
Geological facts
Quartz is one of Earth’s most abundant minerals and commonly forms six-sided crystals, though this specimen does not show diagnostic crystal faces.
Field identification & locations
Common in many rock types and found worldwide. Confirm with a scratch test on glass (quartz can scratch it) and inspect for lack of cleavage; the image alone cannot establish the identification conclusively.
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