mineral
White quartz pebble
Quartz (SiO₂), likely milky quartz
AI-generated identification · may be incorrectOpaque to slightly translucent white, with a smooth water-worn surface and vitreous-to-waxy luster. Quartz has Mohs hardness 7, a trigonal crystal structure, no cleavage, and specific gravity about 2.65; the pebble’s interior cannot be confirmed from the image.
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Physical properties
Opaque to slightly translucent white, with a smooth water-worn surface and vitreous-to-waxy luster. Quartz has Mohs hardness 7, a trigonal crystal structure, no cleavage, and specific gravity about 2.65; the pebble’s interior cannot be confirmed from the image.
Formation & geological history
Quartz crystallizes from silica-rich fluids or magma and commonly occurs in igneous, metamorphic, and sedimentary rocks. This rounded pebble was likely released by weathering and smoothed during transport; its geological age cannot be determined visually.
Uses & applications
Quartz is used in glassmaking, electronics, abrasives, and decorative stonework; this small pebble is mainly suitable for collecting or crafts.
Geological facts
Quartz is one of Earth’s most abundant minerals and resists weathering, so it often accumulates in riverbeds and beaches.
Field identification & locations
Look for hardness near 7, no cleavage, and conchoidal fracture on a broken surface; white quartz pebbles occur worldwide in streams, beaches, and glacial deposits.
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