mineral

Rounded quartz-rich pebble

Most likely milky quartz (SiO₂), possibly a quartzite or pale chert fragment

AI-generated identification · may be incorrect

Off-white, opaque to translucent, matte-to-glassy luster, and smoothly water-worn; quartz hardness is about 7 Mohs, with no visible cleavage and conchoidal fracture. The small size and rounded shape indicate natural abrasion or tumbling.

Identified August 24, 2026More mineral →

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Physical properties

Formation & geological history

Likely formed in silica-rich igneous or metamorphic rocks and later transported by a stream, beach, or glacial deposit; its exact geological age cannot be determined from the photograph.

Uses & applications

Common quartz pebbles have little commercial value but are used in landscaping, crafts, décor, and educational collections; quartzite may also serve as aggregate or building stone.

Geological facts

Quartz is one of Earth’s most abundant minerals and commonly survives weathering because of its hardness and chemical resistance.

Field identification & locations

Look for a cool, glassy feel, hardness sufficient to scratch ordinary glass, and absence of fizzing with dilute acid. Common sources include river gravels, beaches, and quartz veins worldwide.