mineral

Quartz (River Pebble)

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 7 on Mohs scale; Color: White to translucent yellowish-tan; Luster: Vitreous to waxy (when weathered); Crystal Structure: Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: White to translucent yellowish-tan
Luster: Vitreous to waxy (when weathered)

Identified June 30, 2026More mineral →

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Physical properties

Formation & geological history

Forms in various environments including igneous, metamorphic, and sedimentary processes. This specific specimen appears to be a river-worn pebble, shaped by water erosion over hundreds to thousands of years.

Uses & applications

Used in glassmaking, electronics (piezoelectric properties), abrasives, and as decorative aggregate in construction.

Geological facts

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

Field identification & locations

Identify in the field by its hardness (will scratch glass but not be scratched by steel) and lack of cleavage. Commonly found in riverbeds, beaches, and mountain trails worldwide.