mineral

Tumbled quartz (likely milky or rose quartz)

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Hardness 7 Mohs; translucent white to pale pink, with a vitreous-to-waxy luster and conchoidal fracture. Quartz is trigonal and lacks cleavage; the rounded shape is human-tumbled.

Identified August 19, 2026More mineral →

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Physical properties

Hardness 7 Mohs; translucent white to pale pink, with a vitreous-to-waxy luster and conchoidal fracture. Quartz is trigonal and lacks cleavage; the rounded shape is human-tumbled.

Formation & geological history

Quartz crystallizes from silica-rich igneous and hydrothermal fluids, and also occurs in metamorphic and sedimentary rocks. Its geological age is variable, commonly millions to billions of years.

Uses & applications

Used for ornamental stones, lapidary items, carvings, countertops, glass, electronics, and industrial abrasives; this small piece has modest decorative or collecting value.

Geological facts

The apparent pink tint may come from trace iron, microscopic inclusions, or surface lighting; clear internal wisps and fractures are typical of quartz.

Field identification & locations

Identify it by its glassy appearance, lack of cleavage, conchoidal breaks, and ability to scratch ordinary glass; a steel blade should not scratch it. Common sources include Brazil, Madagascar, the United States, and worldwide quartz veins.