mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Hardness of 7 on the Mohs scale, colors vary from translucent white to grey, vitreous luster, trigonal crystal system, conchoidal fracture with no true cleavage, specific gravity of 2.65.

Identified August 5, 2026More mineral →

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Physical properties

Hardness of 7 on the Mohs scale, colors vary from translucent white to grey, vitreous luster, trigonal crystal system, conchoidal fracture with no true cleavage, specific gravity of 2.65.

Formation & geological history

Formed via crystallization in igneous, metamorphic, and sedimentary environments, often rounded into pebbles by water action in rivers or beaches over thousands to millions of years.

Uses & applications

Used in landscaping, decorative gravel, glassmaking, and occasionally polished for lapidary work or jewelry.

Geological facts

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

Field identification & locations

Easily identified in the field by its high hardness (scratches glass) and conchoidal fracture. Found worldwide in almost all geological settings, particularly in stream beds and coastal areas.