mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Hardness of 7 on the Mohs scale, white to clear color, 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, white to clear color, vitreous 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. Quartz pebbles are typically formed through weathering and water erosion of larger quartz-bearing rocks, transported by rivers or waves.

Uses & applications

Used in landscaping, decorative stone, glass manufacturing, abrasives, and electronic components due to its piezoelectric properties.

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 in the field by its high hardness (scratches glass), lack of cleavage, and resistance to weathering. Found globally in riverbeds, beaches, and conglomerate rocks.