mineral

Quartz Pebble

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 7 on Mohs scale; Color: Milky white to light tan; Luster: Vitreous to waxy; Structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65.

Hardness: 7 on Mohs scale
Color: Milky white to light tan
Luster: Vitreous to waxy

Identified July 1, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Milky white to light tan; Luster: Vitreous to waxy; Structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65.

Formation & geological history

Formed via hydrothermal activity or crystallization from cooling magma. This pebble has been weathered and rounded through transport in a riverbed or shoreline over thousands of years.

Uses & applications

Industrial use in glassmaking, abrasives, and electronics. Common in garden landscaping and lapidary tumbling for beginners.

Geological facts

Quartz is the most abundant and varied mineral on Earth's surface. Rounded 'river stones' like this are often found far from their original vein due to hydraulic transport.

Field identification & locations

Identify by its inability to be scratched by a steel knife and lack of cleavage. Found globally in almost all geological environments involving water erosion.