mineral

Quartz Pebble

Silicon dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Tan, beige, to milky white; Luster: Vitreous to waxy; Structure: Hexagonal/Trigonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: Tan, beige, to milky white
Luster: Vitreous to waxy

Identified June 30, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Tan, beige, to milky white; Luster: Vitreous to waxy; Structure: Hexagonal/Trigonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Formation & geological history

Formed from the crystallization of silica-rich magma or precipitation from hydrothermal veins. This specific specimen is water-worn, likely tumbled in a river or ocean environment for thousands of years.

Uses & applications

Common quartz is used in construction as aggregate, in glassmaking, and in electronics for its piezoelectric properties. This specific pebble is primarily for collecting or landscaping.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Its name comes from the German word 'quarz', which has Slavic origins meaning 'hard'.

Field identification & locations

Identify in the field by its hardness (it will scratch glass) and lack of cleavage. Found globally in riverbeds, beaches, and soil. Collectors look for clarity or unique inclusions.