mineral

Milky quartz pebble

Quartz (SiO₂), massive variety

AI-generated identification · may be incorrect

White to cream, translucent in places, with a vitreous-to-dull luster and no visible cleavage; Mohs hardness 7, trigonal crystal structure, specific gravity about 2.65. The rounded shape and smooth surface indicate natural water wear or tumbling.

Identified October 13, 2026More mineral →

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Physical properties

Formation & geological history

Quartz commonly crystallizes from silica-rich fluids in veins and igneous or metamorphic rocks; weathering and transport can round it into a pebble. Its age cannot be determined from the image and may range from ancient host-rock formation to recent erosion.

Uses & applications

Commonly used as a decorative stone, in landscaping and crafts, and as a silica source; attractive pieces may be polished for jewelry or collecting.

Geological facts

Quartz is one of Earth’s most abundant minerals and resists weathering, allowing it to persist in river and beach gravels.

Field identification & locations

Likely quartz based on its pale, slightly translucent appearance and smooth rounded form; confirm with a glass-scratch test, since quartz can scratch glass. Found widely in riverbeds, beaches, and gravels.