mineral

Clear Quartz

Silicon Dioxide (SiO2)

Hardness: 7 (Mohs scale), Color: Colorless/Transparent, Luster: Vitreous (glassy), Crystal System: Hexagonal/Trigonal, Cleavage: None (conchoidal fracture), Specific Gravity: 2.65

Identified April 13, 2026More mineral →

Identify your own rocks.

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

App Store Google Play

Physical properties

Hardness: 7 (Mohs scale), Color: Colorless/Transparent, Luster: Vitreous (glassy), Crystal System: Hexagonal/Trigonal, Cleavage: None (conchoidal fracture), Specific Gravity: 2.65

Formation & geological history

Formed through the crystallization of magma or from hydrothermal veins. It is found in many geological environments ranging from igneous to metamorphic rocks and can be of almost any geological age.

Uses & applications

Used widely in electronics (oscillators), optics, glassmaking, clocks, gemstones, and metaphysical healing practices.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. It is piezoelectric, meaning it generates an electric charge when mechanical stress is applied.

Field identification & locations

Identify by its hardness (will scratch glass), lack of cleavage, and transparent appearance. Commonly found in riverbeds, mountains, and sand. Look for glassy luster and curved fracture surfaces.