mineral
Small quartz-rich mineral fragment
Quartz (SiO₂), possibly milky or chalcedonic quartz
AI-generated identification · may be incorrectPale cream to translucent, vitreous-to-waxy luster, irregular fracture, and no obvious cleavage; quartz has Mohs hardness 7 and specific gravity about 2.65. The granular sparkle may indicate tiny quartz crystal faces or druzy texture.
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Physical properties
Pale cream to translucent, vitreous-to-waxy luster, irregular fracture, and no obvious cleavage; quartz has Mohs hardness 7 and specific gravity about 2.65. The granular sparkle may indicate tiny quartz crystal faces or druzy texture.
Formation & geological history
Likely formed from silica-rich hydrothermal fluids or weathered quartz-bearing rock; the specimen’s exact geological age and locality cannot be determined from the photograph.
Uses & applications
Common quartz is used in glass, ceramics, abrasives, electronics, and engineered stone; attractive pieces may be sold as décor or lapidary material.
Geological facts
Quartz is one of Earth’s most abundant minerals and commonly occurs in igneous, metamorphic, and sedimentary rocks.
Field identification & locations
Field identification requires a scratch test against glass (quartz should scratch it), though this can damage the specimen; confirm with a hand lens and hardness testing. Common worldwide, especially in hydrothermal veins and quartz-rich sands.
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Epidote
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Granite
Granite (Phaneritic intrusive igneous rock)
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