mineral

Quartz Pebble

Silicon Dioxide (SiO2)

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

Identified July 31, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed through crystallization from silica-rich hydrothermal solutions or cooling magma, frequently weathered out from parent rock and rounded by water transport in rivers or beaches.

Uses & applications

Used in glassmaking, electronics, abrasive grit, ornamental items, and gemstone collections.

Geological facts

Quartz is one of the most abundant and durable minerals in 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 white or translucent appearance. Commonly found in riverbeds, beaches, and various geological formations worldwide.