mineral

Clear Quartz

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

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

Hardness: 7 on Mohs scale
Color: Colorless to white
Luster: Vitreous

Identified May 2, 2026More mineral →

Explore Clear 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 white; Luster: Vitreous; Crystal Structure: Hexagonal (Trigonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Formation & geological history

Forms in a wide variety of environments, most commonly by crystallizing from molten magma (igneous) or from hydrothermal veins alongside gold and other minerals. It is also found in sedimentary deposits and metamorphic rocks.

Uses & applications

Used in electronics (oscillators), optical instruments, abrasives, glassmaking, jewelry (gemstones), and as a popular collector specimen for metaphysical and decorative purposes.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. It is piezoelectric, meaning it generates an electric charge when subjected to mechanical stress, which is why it is used in watches.

Field identification & locations

Identify by its hardness (will scratch glass), lack of cleavage, and characteristic six-sided crystal points. Commonly found worldwide, with major high-quality deposits in Brazil, Madagascar, and Arkansas, USA.