mineral

Tumbled quartz (likely milky/rose quartz)

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Hardness 7 Mohs; translucent grayish-white to pale pink, with a vitreous-to-waxy luster and no cleavage. Quartz is trigonal and has a specific gravity near 2.65; tumbling has rounded and polished the surface.

Identified September 19, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich igneous and hydrothermal fluids and also occurs in metamorphic rocks and sedimentary veins. The specimen is human-processed; its exact geological age and source cannot be determined visually.

Uses & applications

Commonly sold as a decorative tumbled stone, meditation stone, or lapidary material; larger clear pieces may be used in jewelry. Ordinary tumbled quartz has modest commercial value.

Geological facts

The apparent pink-gray color may result from iron, inclusions, or surface lighting rather than true rose quartz. Quartz is one of Earth’s most abundant minerals and is a major component of granite, sandstone, and many veins.

Field identification & locations

Identify it by its glassy luster, strong scratch resistance, rounded polish, and lack of cleavage; it should scratch ordinary glass but not be scratched by a steel knife. Common worldwide, especially in Brazil, Madagascar, the United States, and Europe.