mineral

Quartz pebble

Silicon dioxide (SiO2)

Hardness of 7 on the Mohs scale, typically white or colorless, vitreous luster, trigonal crystal system, conchoidal fracture with no true cleavage, specific gravity of 2.65.

Identified July 29, 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

Hardness of 7 on the Mohs scale, typically white or colorless, vitreous luster, trigonal crystal system, conchoidal fracture with no true cleavage, specific gravity of 2.65.

Formation & geological history

Formed in a wide variety of geological environments, frequently hydrothermal veins, igneous rocks like granite, and resistant sedimentary deposits where weathering leaves behind durable quartz grains.

Uses & applications

Used in glassmaking, electronics, oscillators, abrasives, and as a common ornamental or lapidary stone.

Geological facts

Quartz is one of the most abundant and durable minerals in Earth's continental crust, able to withstand weathering processes that destroy most other minerals.

Field identification & locations

Easily identified by its high hardness (it scratches glass easily), lack of cleavage, and glassy luster. Found globally in riverbeds, beaches, and soil.