mineral

Tumbled quartz (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Hardness 7 Mohs; cloudy white to translucent gray, vitreous luster, and no cleavage. It has a trigonal crystal structure, though tumbling has rounded the visible shape.

Identified September 28, 2026More mineral →

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Physical properties

Hardness 7 Mohs; cloudy white to translucent gray, vitreous luster, and no cleavage. It has a trigonal crystal structure, though tumbling has rounded the visible shape.

Formation & geological history

Quartz commonly crystallizes from silica-rich fluids in veins and cavities, or forms in igneous and metamorphic rocks. Its age cannot be determined from the image; quartz occurs in rocks of many geological ages.

Uses & applications

Used in glass, electronics, and abrasives; attractive pieces are collected or made into jewelry and decorative objects.

Geological facts

Quartz is one of Earth’s most abundant minerals and is highly resistant to weathering.

Field identification & locations

The pale, translucent appearance and glassy look are consistent with tumbled quartz, but the small specimen cannot be identified conclusively from appearance alone. Quartz occurs worldwide; scratch testing against glass can help distinguish it from softer lookalikes.