mineral

Likely milky quartz pebble

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Smooth, rounded, opaque white to pale cream with a vitreous-to-waxy surface; quartz has Mohs hardness 7, trigonal crystal structure, no cleavage, and specific gravity about 2.65. The image does not show enough diagnostic detail to rule out another pale pebble, such as marble or feldspar.

Identified September 27, 2026More mineral →

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Physical properties

Formation & geological history

If quartz, it likely formed when silica-rich fluids crystallized in veins, then weathered and was rounded by water or abrasion; quartz occurs in rocks of many geological ages.

Uses & applications

Common quartz is used in glassmaking, electronics, abrasives, and decorative objects; this small pebble is mainly a modest collectible or craft material.

Geological facts

Quartz is abundant in Earth’s crust and resists weathering, so rounded quartz pebbles commonly accumulate in streams and beaches.

Field identification & locations

Its smooth, hard surface and milky translucence fit quartz, but a hardness test (quartz scratches glass) and closer inspection would help distinguish it from softer marble or feldspar. Quartz is widespread worldwide.