mineral

Rounded quartz-rich pebble, possibly milky quartz

Quartz (SiO₂), provisional identification

AI-generated identification · may be incorrect

Cream to pale tan, smoothly water-worn, with a dull to faintly vitreous luster; likely Mohs hardness about 7, massive rather than visibly crystalline, with no obvious cleavage. The image alone cannot confirm composition or specific gravity.

Identified August 18, 2026More mineral →

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Physical properties

Formation & geological history

Probably a naturally weathered and transported pebble formed from quartz-bearing igneous or metamorphic rock; its geological age is indeterminate and may greatly predate recent erosion.

Uses & applications

Common quartz pebbles are used as landscaping stone, aggregate, decorative material, and occasional lapidary pieces; this specimen appears mainly suitable for collecting.

Geological facts

Its rounded shape indicates abrasion during transport by water, waves, or sediment. A steel nail should not scratch quartz, while quartz can scratch ordinary glass.

Field identification & locations

Commonly found in stream beds, beaches, glacial deposits, and gravel pits worldwide. Confirm with a streak test (white), glass-scratch test, and examination for translucency or quartz grain structure.