mineral

Tumbled quartz-rich pebble

Quartz (SiO₂), likely with iron-oxide staining and minor inclusions

AI-generated identification · may be incorrect

Hardness 7 Mohs; pale cream to yellow, translucent to opaque, with a glassy-to-waxy luster and no obvious cleavage. The rounded shape indicates natural abrasion or tumbling; specific gravity is about 2.65.

Identified September 7, 2026More mineral →

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Physical properties

Formation & geological history

Likely a weathered quartz vein fragment or quartz-rich metamorphic/igneous rock, rounded by stream transport or human tumbling. Quartz formed in hydrothermal veins or magmatic/metamorphic settings over a wide range of geological ages.

Uses & applications

Common quartz pebbles are used in landscaping, decorative stone, crafts, and lapidary work; transparent, attractive varieties may be used as gemstones. This specimen appears more decorative than gem-grade.

Geological facts

Yellow coloration commonly results from iron oxides or hydroxides rather than true citrine. Quartz is one of Earth’s most abundant and chemically durable minerals.

Field identification & locations

Identify by its pale color, glassy appearance, rounded form, and resistance to scratching; it should scratch glass but not be scratched by a steel blade. Common worldwide in river gravels, quartz veins, and quartz-rich rocks.