mineral

Tumbled quartz-rich pebble

Milky quartz with possible feldspar or mica inclusions (SiO₂-dominant)

AI-generated identification · may be incorrect

Hardness about 7 Mohs; pale gray-white, opaque to translucent, with a dull-to-waxy luster and irregular granular texture. Quartz has no cleavage and conchoidal fracture; the rounded shape appears naturally water-worn or tumbled.

Identified September 10, 2026More mineral →

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Physical properties

Formation & geological history

Likely eroded from a quartz vein or quartz-rich metamorphic/igneous rock, then rounded by stream or beach transport; its precise geological age cannot be determined visually. Common host rocks include granite, gneiss, and schist.

Uses & applications

Primarily a lapidary, craft, or educational specimen; quartz is widely used in glass, electronics, abrasives, and engineered stone. This small piece has little jewelry value unless it displays unusual inclusions or locality significance.

Geological facts

Milky quartz becomes cloudy when microscopic fluid inclusions, fractures, or mineral impurities scatter light. The gray-brown areas may be iron staining, feldspar, mica, or weathered host rock.

Field identification & locations

Identify it by its pale color, glassy-to-waxy appearance, lack of cleavage, and resistance to scratching; it should scratch ordinary glass but not be scratched by a steel knife. Common in stream gravels worldwide.