mineral

Milky quartz pebble

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

White to cream, translucent, with a glassy-to-waxy luster and poorly visible crystal faces; hardness 7 Mohs, no cleavage, conchoidal fracture, and specific gravity about 2.65. The rounded shape indicates natural water or abrasion wear.

Identified August 31, 2026More mineral →

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Physical properties

Formation & geological history

Likely formed in a quartz-rich igneous or metamorphic vein and later weathered into a pebble; quartz commonly formed during Precambrian to Phanerozoic geological events. The photograph alone cannot establish its exact age or locality.

Uses & applications

Common quartz is used in glass, ceramics, abrasives, electronics, and engineered stone; attractive pieces may be used as decorative or lapidary material, though this specimen appears modest.

Geological facts

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

Field identification & locations

Identify by its hardness, lack of cleavage, and glass-scratching ability; it should scratch ordinary steel or glass, though testing may damage it. Common worldwide in veins, pegmatites, river gravels, and beaches.