mineral
Likely milky quartz pebble
Quartz (silicon dioxide, SiO₂)
AI-generated identification · may be incorrectThe small, rounded specimen appears pale gray-white and opaque to slightly translucent with a dull, weathered surface. Quartz has Mohs hardness 7, a trigonal crystal structure, vitreous luster when fresh, and no cleavage; the image is too blurry for confirmation.
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Physical properties
The small, rounded specimen appears pale gray-white and opaque to slightly translucent with a dull, weathered surface. Quartz has Mohs hardness 7, a trigonal crystal structure, vitreous luster when fresh, and no cleavage; the image is too blurry for confirmation.
Formation & geological history
Quartz commonly forms as crystals in silica-rich veins and igneous or metamorphic rocks, then survives weathering and becomes rounded in streams or sediment. Quartz is widespread across geological ages.
Uses & applications
Quartz is used in glass, electronics, abrasives, and decorative stones; this pebble appears to have little commercial value.
Geological facts
Quartz is one of Earth’s most abundant minerals and fractures with a distinctive curved, conchoidal surface.
Field identification & locations
Check for hardness sufficient to scratch glass and a lack of cleavage; the rounded shape suggests transport by water. Quartz occurs worldwide in veins, beaches, and river gravels.
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