mineral

Tumbled milky quartz

Quartz (SiO₂), likely massive milky quartz

AI-generated identification · may be incorrect

Opaque to translucent cream, honey, and white; vitreous to waxy luster with a rounded, tumbled surface. Mohs hardness 7; trigonal crystal structure, with no cleavage and conchoidal fracture. The photo does not allow reliable specific-gravity measurement.

Identified October 3, 2026More mineral →

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Physical properties

Formation & geological history

Quartz formed as silica-rich fluids crystallized in veins or cavities, commonly within igneous and metamorphic rocks; the specimen has been naturally rounded or mechanically tumbled. Quartz is widespread and occurs in rocks of many geological ages.

Uses & applications

Used for decorative stones, crafts, countertops, and mineral collecting; this small piece is primarily ornamental.

Geological facts

Quartz is one of Earth’s most abundant minerals and scratches ordinary glass. Its warm color may come from iron staining, but the image cannot confirm that.

Field identification & locations

The smooth pebble-like shape and cloudy, glassy quartz appearance support this identification. Quartz is plausible in Bahia, Brazil, but the coarse location alone cannot establish where it was collected; a scratch test and inspection of a fresh surface could help confirm it.