mineral
Rounded quartz pebble
Quartz (SiO₂), likely milky quartz
AI-generated identification · may be incorrectOpaque to slightly translucent white, with a dull-to-waxy surface and rounded shape from abrasion. Quartz has Mohs hardness 7, a trigonal crystal structure, no cleavage, and specific gravity about 2.65; the photo alone cannot confirm the material.
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Physical properties
Opaque to slightly translucent white, with a dull-to-waxy surface and rounded shape from abrasion. Quartz has Mohs hardness 7, a trigonal crystal structure, no cleavage, and specific gravity about 2.65; the photo alone cannot confirm the material.
Formation & geological history
Likely formed as quartz in an igneous or metamorphic rock, then released by weathering and rounded during transport in a stream or shoreline. Quartz is common in rocks of many geological ages.
Uses & applications
Quartz is used in glassmaking, electronics, and construction; this small rounded piece is mainly suitable for collecting or craft use.
Geological facts
Quartz is one of Earth’s most abundant minerals and is highly resistant to chemical weathering.
Field identification & locations
Look for hardness sufficient to scratch glass, a glassy or waxy luster, and no obvious cleavage; a simple visual identification is not definitive. Rounded white quartz pebbles occur in river gravels, beaches, and glacial deposits worldwide.
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