mineral

White Quartz Pebble

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Milky white to translucent; Luster: Vitreous to waxy (when tumbled); Crystal Structure: Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: Milky white to translucent
Luster: Vitreous to waxy (when tumbled)

Identified May 24, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Milky white to translucent; Luster: Vitreous to waxy (when tumbled); Crystal Structure: Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Formation & geological history

Formed through hydrothermal processes in veins or as a constituent of igneous and metamorphic rocks. This specific specimen is likely a water-worn or mechanically tumbled pebble from a riverbed or coastal environment.

Uses & applications

Used in landscaping, decorative stone, jewelry making (cabochons), and as a source for silicon in semiconductors or glass manufacturing.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz gets its white color from tiny fluid inclusions of gas or liquid trapped during crystal growth.

Field identification & locations

Identify by its ability to scratch glass and lack of cleavage. It is found globally in almost all geological environments. Collectors can find these easily in riverbanks and gravel pits.