mineral

Clear Quartz

Silicon Dioxide (SiO2)

Hardness: 7.0 Mohs; Color: Clear/Colorless; Luster: Vitreous (glass-like); Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7
Color: Clear/Colorless
Luster: Vitreous (glass-like)

Identified April 24, 2026More mineral →

Identify your own rocks.

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

App Store Google Play

Physical properties

Hardness: 7.0 Mohs; Color: Clear/Colorless; Luster: Vitreous (glass-like); Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Formation & geological history

Formed through the crystallization of silica-rich hydrothermal solutions or within igneous pegmatites. It is found across all geological ages and in various metamorphic and sedimentary environments.

Uses & applications

Used in electronics (oscillators), glassmaking, abrasive manufacturing, optical instruments, and widely in jewelry and metaphysical collecting.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Pure quartz is traditionally called rock crystal or clear quartz and was historically believed to be permanently frozen ice.

Field identification & locations

Identify by its hardness (will scratch glass and steel), lack of cleavage, and hexagonal crystal prisms if unbroken. Found globally, especially in mountain ranges and riverbeds.