mineral

White quartz-rich pebble

Quartz (SiO₂), possibly milky quartz or quartzite

AI-generated identification · may be incorrect

White to translucent, vitreous-to-waxy luster, hardness about 7 Mohs, no visible cleavage, conchoidal fracture, and typical specific gravity near 2.65. The rounded shape indicates natural abrasion or tumbling.

Identified August 9, 2026More mineral →

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Physical properties

Formation & geological history

Likely weathered milky quartz or quartzite derived from igneous or metamorphic rocks; quartz formed in veins or crystalline rocks across many geological ages, then eroded and transported by water or ice.

Uses & applications

Common quartz pebbles are used decoratively, in landscaping, aggregate, and lapidary work; attractive pieces may be polished, though this specimen has little jewelry value.

Geological facts

Quartz is one of Earth’s most abundant minerals and is highly resistant to weathering, allowing it to persist as rounded stream and beach pebbles.

Field identification & locations

Test with a steel file or knife: quartz should resist scratching; it will scratch glass, unlike calcite or most feldspar. Common worldwide in streams, beaches, gravel deposits, and quartz veins.