mineral

Clear Quartz

Silicon Dioxide (SiO2)

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

Identified April 28, 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 Structure: Trigonal, Cleavage: None (conchoidal fracture), Specific Gravity: 2.65

Formation & geological history

Formed through the cooling of silica-rich magma or from hydrothermal veins. It is found in all geological ages and across igneous, metamorphic, and sedimentary environments.

Uses & applications

Used in electronics (oscillators), glass manufacturing, abrasives, jewelry (semiprecious stones), and spiritual/ornamental collections.

Geological facts

Quartz is one of the most abundant minerals in Earth's crust. It is piezoelectric, meaning it generates an electric charge when mechanical stress is applied, a property used in watches and radios.

Field identification & locations

Identify by its hexagonal crystal habit and its ability to scratch glass (hardness 7). It lacks cleavage, meaning it breaks like glass in curved (conchoidal) patterns rather than clean planes.