mineral

White quartz pebble

Quartz (SiO₂), likely milky quartz

AI-generated identification · may be incorrect

White, opaque to slightly translucent, with a dull-to-glassy luster and no visible cleavage; quartz has Mohs hardness 7, trigonal crystal structure, and specific gravity about 2.65. The rounded shape and worn surface suggest it has been transported or weathered.

Identified October 10, 2026More mineral →

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Physical properties

Formation & geological history

Likely a fragment of quartz vein or quartz-rich rock, later rounded by water or abrasion. Quartz forms in many geological settings and occurs across a wide range of ages.

Uses & applications

Commonly collected as a pebble or used decoratively in landscaping and crafts; quartz is also important in glassmaking and electronics.

Geological facts

Quartz is one of Earth’s most abundant minerals and resists chemical weathering, so it often survives as rounded stream or beach pebbles.

Field identification & locations

Look for hardness (it should scratch glass), lack of cleavage, and a white streak. Found widely in river gravels, beaches, and soils; the photo alone cannot confirm the exact source or purity.