mineral

Tumbled quartz-rich stone, likely milky quartz

Quartz (SiO₂), possibly iron-stained milky quartz or quartzite

AI-generated identification · may be incorrect

Typically Mohs hardness 7, white to cream with translucent edges, vitreous-to-waxy luster, and no visible cleavage; the rounded shape indicates tumbling. Brown-orange marks are likely iron-oxide staining or included matrix.

Identified August 11, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich hydrothermal fluids or igneous melts; quartzite forms when quartz sandstone is metamorphosed. Ages vary widely, commonly millions to billions of years.

Uses & applications

Used for carvings, lapidary pieces, tumbling, countertops, glass, ceramics, and abrasives; this small specimen has modest decorative or educational value.

Geological facts

Quartz is one of Earth’s most abundant minerals and is the principal component of many sands and sandstones. A steel blade should not scratch it, though quartz can scratch ordinary glass.

Field identification & locations

Common in igneous, metamorphic, and sedimentary rocks worldwide, especially river gravels and pegmatites. Confirm with a glass-scratch test and inspect for granular texture if distinguishing quartzite from massive quartz.