mineral

White Quartz Pebble

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness of 7 on the Mohs scale, white or milky color, vitreous to greasy luster, trigonal crystal system, conchoidal fracture with no true 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 or milky color, vitreous to greasy luster, trigonal crystal system, conchoidal fracture with no true cleavage, specific gravity of 2.65.

Formation & geological history

Forms in a wide variety of geological environments including igneous, metamorphic, and sedimentary rocks. Often accumulates as resistant pebbles in streams and beaches due to weathering and high chemical stability.

Uses & applications

Used in glassmaking, abrasives, electronic components, lapidary arts, and ornamental gravel.

Geological facts

Quartz is one of the most abundant and durable minerals in Earth's continental crust. Its high resistance to chemical weathering allows it to survive long transport distances in river systems.

Field identification & locations

Easily identified in the field by its high hardness (scratches glass), lack of cleavage, and glassy luster. Common worldwide in gravel bars, river beds, and coastal beaches.