mineral

Tumbled quartz pebble

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Likely milky quartz: white, translucent to opaque, with a vitreous-to-waxy luster and no visible cleavage; Mohs hardness 7 and specific gravity about 2.65. Its smooth rounded shape indicates natural water wear or tumbling.

Identified August 30, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallized from silica-rich igneous or hydrothermal fluids, commonly in veins and pegmatites; the specimen was later weathered and rounded. Quartz is abundant from Precambrian to modern geological settings.

Uses & applications

Used for collecting, decorative stone, landscaping, abrasives, glass, and electronics; this small common pebble has little commercial value.

Geological facts

Milky whiteness results from microscopic fluid inclusions, fractures, or impurities. Quartz commonly scratches glass and produces a white streak.

Field identification & locations

Identify it by its hardness, glassy appearance, irregular fracture, and lack of cleavage; common sources include quartz veins, stream gravels, and glacial deposits worldwide. Exact identification is limited by the image; it could also be a pale quartz-rich pebble.