mineral

Tumbled milky quartz pebble

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Hardness 7 Mohs; translucent white to pale gray, with a vitreous-to-waxy luster and no visible cleavage. It has a hexagonal crystal structure, though tumbling has rounded and frosted the surface; specific gravity is about 2.65.

Identified August 16, 2026More mineral →

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Physical properties

Formation & geological history

Likely a naturally worn quartz fragment, later smoothed by tumbling or abrasion; quartz formed in igneous, metamorphic, or hydrothermal environments over a wide range of geological ages. The image alone cannot establish its exact source or age.

Uses & applications

Used as a low-cost ornamental, craft, landscaping, and metaphysical stone; polished quartz is also used in jewelry and industrial silica products. This small common specimen generally has minimal commercial value.

Geological facts

Milky appearance results from microscopic fluid inclusions, fractures, or impurities scattering light. Quartz is one of Earth’s most abundant and chemically durable minerals.

Field identification & locations

Identify by its glassy/waxy appearance, lack of cleavage, rounded form, and ability to scratch ordinary glass; a steel blade usually does not scratch it. Common worldwide in veins, gravels, pegmatites, and quartz-rich rocks.