mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Hardness of 7 on the Mohs scale, white to translucent color with gray patches, vitreous luster, conchoidal fracture, no cleavage, specific gravity of 2.65.

Identified August 6, 2026More mineral →

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Physical properties

Hardness of 7 on the Mohs scale, white to translucent color with gray patches, vitreous luster, conchoidal fracture, no cleavage, specific gravity of 2.65.

Formation & geological history

Formed through crystallization in igneous, metamorphic, or sedimentary environments, subsequently weathered, transported, and rounded by water action in rivers or marine environments.

Uses & applications

Used in landscaping, decorative stone, glass manufacturing, abrasives, and as a common specimen for beginning rock collectors.

Geological facts

Quartz is one of the most abundant and durable minerals on Earth's continental crust, highly resistant to both chemical and mechanical weathering.

Field identification & locations

Easily identified by its high hardness (scratches glass), lack of cleavage, and smooth, water-worn shape. Commonly found in riverbeds, beaches, and glacial deposits worldwide.