mineral

Quartz Pebble

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 7 on Mohs scale; Color: Tan, yellowish-white, or translucent; Luster: Vitreous to waxy (weathered); Crystal structure: Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65

Hardness: 7 on Mohs scale
Color: Tan, yellowish-white, or translucent
Luster: Vitreous to waxy (weathered)

Identified July 18, 2026More mineral →

Explore Quartz Pebble in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Formed from the crystallization of silica-rich hydrothermal fluids or within igneous and metamorphic rocks. This specific specimen has been rounded by mechanical erosion in a high-energy aquatic environment like a river or beach.

Uses & applications

Quartz is used in glassmaking, electronics (piezoelectric properties), abrasives, and as a common component in construction aggregate and landscaping gravel.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Yellow tones often suggest minor iron oxide staining or inclusions within the crystal lattice.

Field identification & locations

Identify in the field by its hardness (will scratch glass), lack of cleavage, and water-worn 'sugar-like' texture on fractured surfaces. Very common in riverbeds and coastal regions worldwide.