mineral
Likely clear quartz fragment
Quartz (SiO₂)
AI-generated identification · may be incorrectSmall, translucent to nearly colorless fragment with glassy luster and irregular fracture; quartz has Mohs hardness 7 and a trigonal crystal structure, with no cleavage. Identification from the image alone is uncertain.
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Physical properties
Small, translucent to nearly colorless fragment with glassy luster and irregular fracture; quartz has Mohs hardness 7 and a trigonal crystal structure, with no cleavage. Identification from the image alone is uncertain.
Formation & geological history
Quartz crystallizes from silica-rich fluids in igneous and metamorphic settings and can persist in sedimentary deposits; it is among Earth’s most common minerals and occurs in rocks of many ages.
Uses & applications
Quartz is used in glassmaking, electronics, abrasives, and jewelry; this tiny rough fragment has little practical or gem value.
Geological facts
Quartz commonly breaks with curved, shell-like (conchoidal) surfaces rather than splitting along cleavage planes.
Field identification & locations
Look for glassy translucence, hardness sufficient to scratch ordinary glass, and absence of cleavage; common worldwide in veins, pegmatites, and gravel. A simple hardness test is not definitive and may damage the specimen.
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Epidote
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Unidentified pink-and-gray mineral or rock specimen
Undetermined; the image is too blurry for reliable identification
mineral