mineral

White quartz pebble (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

White, opaque to translucent, smoothly tumbled or water-worn, with a vitreous to waxy luster; Mohs hardness 7, no cleavage, conchoidal fracture, trigonal crystal structure, and specific gravity about 2.65.

Identified September 16, 2026More mineral →

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Physical properties

Formation & geological history

Likely formed in silica-rich igneous or metamorphic veins and later released by weathering and rounded by stream or beach abrasion; its precise geological age cannot be determined from the image.

Uses & applications

Used as a common decorative, landscaping, and collecting stone; quartz is also important in glass, ceramics, abrasives, electronics, and engineered stone.

Geological facts

Milky color results from microscopic fluid inclusions, fractures, or impurities that scatter light. The smooth oval shape indicates substantial abrasion or deliberate tumbling.

Field identification & locations

Identify it by its white color, glassy surface, lack of cleavage, and ability to scratch ordinary glass; a steel knife should not scratch it. Common worldwide, especially in quartz veins, river gravels, and beaches.