mineral
Tumbled quartz pebble
Quartz (SiO₂), likely iron-stained milky quartz
AI-generated identification · may be incorrectRounded, opaque white-to-cream stone with rusty brown patches; vitreous to dull luster. Quartz has Mohs hardness 7, a trigonal crystal structure, and no cleavage; the specimen’s specific gravity is likely about 2.65.
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Physical properties
Rounded, opaque white-to-cream stone with rusty brown patches; vitreous to dull luster. Quartz has Mohs hardness 7, a trigonal crystal structure, and no cleavage; the specimen’s specific gravity is likely about 2.65.
Formation & geological history
Likely quartz-rich rock naturally rounded by water or abrasion, then possibly tumbled smooth. Quartz forms in many geological settings and occurs from ancient to recent deposits.
Uses & applications
Common as a collectible or decorative pebble; quartz is also widely used in glassmaking, electronics, and construction materials.
Geological facts
The brown areas are consistent with iron-oxide staining, though the photo cannot confirm the exact minerals or rock type.
Field identification & locations
Look for hardness near 7, glassy fracture, and white or translucent quartz areas; common in river gravels and quartz-bearing terrains worldwide. The image shows no diagnostic features for a more precise identification.
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