mineral

Milky quartz pebble

Quartz (SiO₂), likely massive or vein quartz

AI-generated identification · may be incorrect

Opaque to translucent white-gray, with a vitreous to waxy surface and a rounded, water-worn shape; quartz has Mohs hardness 7, hexagonal crystal symmetry, no cleavage, and conchoidal fracture. The photograph does not show distinct crystal faces, so exact identification is not certain.

Identified September 27, 2026More mineral →

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Physical properties

Formation & geological history

Likely formed when silica-rich fluids deposited quartz in fractures, then weathered and rounded by transport in water. Quartz veins occur in rocks of many ages; the pebble's source and geological age cannot be determined from the image.

Uses & applications

Quartz is widely used in glass, electronics, abrasives, and construction; attractive pieces are collected or used in simple crafts.

Geological facts

Quartz is one of Earth's most abundant minerals and commonly occurs in veins and many rock types.

Field identification & locations

A hard, pale pebble with no obvious cleavage is consistent with quartz; a scratch test on glass can help distinguish it from softer lookalikes. Quartz occurs worldwide, but the image gives no locality clues.