mineral

Tumbled milky quartz pebble

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

Creamy-white, translucent to opaque, with a smooth rounded surface and vitreous-to-waxy luster. Quartz has hardness 7, no cleavage, conchoidal fracture, hexagonal crystal structure, and specific gravity about 2.65.

Identified August 13, 2026More mineral →

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Physical properties

Formation & geological history

Likely natural quartz rounded by stream or beach abrasion, then possibly tumbled and polished. Quartz formed in igneous, metamorphic, and hydrothermal settings over a wide range of geological ages.

Uses & applications

Common as a lapidary, craft, and collectible stone; crushed quartz is used in glassmaking, ceramics, engineered stone, and electronics. This small specimen has minimal commercial value.

Geological facts

The cloudy appearance results from microscopic fluid inclusions, fractures, or finely distributed mineral impurities. Quartz is one of Earth’s most abundant and chemically resistant minerals.

Field identification & locations

Identify by its glassy appearance, lack of cleavage, conchoidal fracture, and ability to scratch ordinary glass. Common worldwide, especially in quartz veins, granitic rocks, metamorphic terrains, and stream gravels; exact identification from the image is not certain without testing.