mineral

Possible quartz-rich pebble or chalcedony

Quartz (SiO₂), possibly microcrystalline chalcedony

AI-generated identification · may be incorrect

Small rounded, cream-white specimen with a dull to slightly waxy luster and likely translucent edges; visible granular or fibrous texture. Quartz has Mohs hardness 7, no cleavage, conchoidal fracture, and specific gravity about 2.65; these properties require testing to confirm.

Identified August 28, 2026More mineral →

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Physical properties

Formation & geological history

Likely a naturally weathered quartz or chalcedony pebble formed in silica-rich veins or sedimentary gravel, commonly ranging from Precambrian to recent age. The rounded shape indicates transport by water or erosion.

Uses & applications

Quartz is used in glass, electronics, ceramics, abrasives, and construction aggregate; attractive chalcedony may be cut or polished for cabochons and carvings. This small unpolished piece has minimal commercial value.

Geological facts

A steel nail should not scratch quartz, while quartz can scratch ordinary glass. A strong flashlight may reveal translucency, and a streak test on unglazed porcelain should be white.

Field identification & locations

Common in river gravels, soils, quartz veins, and weathered rocks worldwide. Confirm by hardness, conchoidal fracture, lack of cleavage, and—if available—specific gravity; the image alone cannot distinguish quartz from calcite or pale limestone confidently.