mineral

White Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Hardness: 7 on Mohs scale; Color: Opaque white (milky); Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65

Hardness: 7 on Mohs scale
Color: Opaque white (milky)
Luster: Vitreous to waxy

Identified May 17, 2026More mineral →

Identify your own rocks.

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

App Store Google Play

Physical properties

Hardness: 7 on Mohs scale; Color: Opaque white (milky); Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65

Formation & geological history

Formed through hydrothermal processes or within igneous and metamorphic rocks. This specimen is a 'river stone' or 'beach pebble,' meaning its rounded shape was created by water erosion over long periods.

Uses & applications

Used in landscaping, aquariums, glass manufacturing, electronics (due to piezoelectric properties), and as decorative stones/tumbled gems for collectors.

Geological facts

Quartz is one of the most abundant minerals in Earth's continental crust. The white color is usually caused by tiny fluid inclusions of gas or liquid trapped during the crystal's growth.

Field identification & locations

Identify in the field by its hardness (it will scratch glass) and lack of cleavage. It is commonly found in riverbeds, beaches, and gravel pits worldwide.