mineral

White quartz pebble

Quartz (SiO₂), likely milky quartz

AI-generated identification · may be incorrect

Opaque to slightly translucent cream-white pebble with a vitreous-to-waxy surface and iron-stained fractures. Quartz has Mohs hardness 7, a trigonal crystal structure, no cleavage, and specific gravity about 2.65; the image alone cannot confirm the identification.

Identified October 6, 2026More mineral →

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Physical properties

Formation & geological history

Likely a quartz fragment rounded by water or sediment transport; quartz forms in many igneous, metamorphic, and hydrothermal settings. Its geological age cannot be determined from the photo.

Uses & applications

Common quartz is used in glassmaking, construction aggregate, and electronics; attractive pieces are kept as inexpensive curios or polished stones.

Geological facts

Quartz is one of Earth’s most abundant minerals and breaks with a curved, conchoidal fracture rather than splitting along cleavage planes.

Field identification & locations

Look for hardness sufficient to scratch glass and lack of cleavage; similar white pebbles may be calcite, which is softer and fizzes in dilute acid. Quartz occurs worldwide in riverbeds, beaches, and veins.