mineral

Tumbled milky quartz pebble

Quartz, SiO₂

AI-generated identification · may be incorrect

Creamy white to beige with brown veining and a polished, vitreous-to-waxy luster; hardness 7 Mohs, trigonal crystal structure, no cleavage, and specific gravity about 2.65. The image suggests quartz, though the exact variety cannot be confirmed visually.

Identified September 29, 2026More mineral →

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Physical properties

Formation & geological history

Quartz formed as silica crystallized in or filled fractures within rock, then weathering and water abrasion rounded it; quartz occurs in rocks of many ages. This specimen appears naturally rounded and polished, possibly by tumbling.

Uses & applications

Used for jewelry, decorative objects, and mineral collections; quartz is also important in glassmaking and electronics.

Geological facts

Quartz is one of Earth’s most abundant minerals and resists weathering, allowing it to persist in stream and beach gravels.

Field identification & locations

Look for hardness near 7, glass that it can scratch, and irregular fracture rather than cleavage; common worldwide in veins, pegmatites, and river gravels. Similar cream-colored stones may be other minerals, so identification from the image is provisional.