mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: White to translucent; Luster: Vitreous to greasy; Crystal Structure: Trigonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: White to translucent
Luster: Vitreous to greasy

Identified August 5, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: White to translucent; Luster: Vitreous to greasy; Crystal Structure: Trigonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Formation & geological history

Formed through crystallization in igneous, metamorphic, and sedimentary environments, later weathered, transported, and water-worn into a smooth pebble over millions of years.

Uses & applications

Used in landscaping, decorative stone, glass manufacturing, abrasives, and as a common sample for rock tumbling and lapidary work.

Geological facts

Quartz is one of the most abundant minerals in the Earth's continental crust. Its high durability allows it to survive long-distance transport in rivers and streams, forming smooth white pebbles.

Field identification & locations

Easily identified by its hardness (scratches glass), lack of cleavage, and resistance to weathering. Found globally in riverbeds, beaches, and glacial deposits.