mineral

Quartz-rich pebble

Mostly quartz (SiO₂), possibly a quartzite or vein-quartz fragment

AI-generated identification · may be incorrect

Creamy white to tan, translucent in places, with a vitreous-to-dull luster and irregular fracture; quartz hardness is 7 Mohs and its crystals are trigonal. The small, rounded specimen’s exact composition and specific gravity cannot be determined from the image.

Identified September 28, 2026More mineral →

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Physical properties

Formation & geological history

Likely weathered from quartz-rich rock or a quartz vein and rounded by transport in water or beach action. Quartz is widespread in rocks of many ages; the image cannot establish this pebble’s geological age.

Uses & applications

Common quartz pebbles are collected or used decoratively; quartz also has major industrial uses in glass, ceramics, and electronics. This specimen appears too small and opaque for fine jewelry.

Geological facts

Quartz is one of Earth’s most abundant minerals and occurs in igneous, sedimentary, and metamorphic rocks. The pebble’s tan patches may be iron staining or inclusions.

Field identification & locations

Look for glassy or translucent areas, hardness sufficient to scratch ordinary glass, and no cleavage; these clues support quartz, though a definitive identification may require testing. Quartz-rich pebbles are found in riverbeds, beaches, and glacial deposits worldwide.