mineral

Quartz (specifically Clear or Rose Quartz)

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 7 on Mohs scale; Color: Colorless to pale pink; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: Colorless to pale pink
Luster: Vitreous (glassy)

Identified July 12, 2026More mineral →

Explore Quartz (specifically Clear or Rose Quartz) in the encyclopedia →

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: Colorless to pale pink; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Formation & geological history

Forms in igneous, metamorphic, and sedimentary environments through the cooling of silica-rich magma or precipitation from hydrothermal veins. It is one of the most abundant minerals in the Earth's crust.

Uses & applications

Used in glassmaking, abrasives, electronic oscillators (due to piezoelectricity), and extensively in jewelry and gemstone collecting.

Geological facts

Quartz is piezoelectric, meaning it generates an electric charge when mechanical stress is applied. It is also the main constituent of most sand.

Field identification & locations

Identify by its hardness (scratches glass), lack of cleavage, and glassy appearance. Found globally in almost all geological settings, particularly in mountain ranges and riverbeds.