mineral

Likely milky quartz pebble

Quartz (SiO₂), crystalline silica

AI-generated identification · may be incorrect

Pale, translucent white to gray, with a vitreous luster and no visible cleavage; quartz has Mohs hardness 7 and a trigonal crystal structure. The rounded shape suggests it has been naturally worn or tumbled.

Identified October 3, 2026More mineral →

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Physical properties

Formation & geological history

Quartz commonly forms as silica-rich fluids crystallize in veins and other igneous or metamorphic settings; it occurs in rocks of many ages. The pebble shape likely formed through abrasion during transport or deliberate tumbling.

Uses & applications

Commonly collected or used in decorative objects, jewelry, and silica-related industrial products; this small specimen is mainly ornamental.

Geological facts

Quartz is one of Earth’s most abundant minerals and is resistant to weathering, so it often survives after surrounding rock breaks down.

Field identification & locations

Look for glassy luster, lack of cleavage, and hardness sufficient to scratch ordinary glass; these traits cannot be confirmed from the photograph alone. Quartz occurs worldwide.