mineral

Tumbled milky quartz pebble

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

Creamy white to pale yellow, opaque to slightly translucent, with a vitreous-to-waxy luster and no visible cleavage; Mohs hardness 7, trigonal crystal structure. The rounded shape and surface wear are consistent with a naturally water-worn pebble or a tumbled specimen.

Identified October 10, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich melts or hydrothermal fluids and is also common in many rocks; this piece’s precise age and source cannot be determined from the image. Its smooth outline likely formed through transport and abrasion or tumbling.

Uses & applications

Quartz is widely used in glassmaking, electronics, and construction; attractive pebbles are used for crafts and collecting.

Geological facts

Quartz is one of Earth’s most abundant minerals and resists weathering, so it commonly accumulates in riverbeds and beaches.

Field identification & locations

Look for hardness sufficient to scratch glass, lack of cleavage, and a pale, glassy or waxy appearance; quartz occurs worldwide. The image alone cannot confirm the identification.