mineral

Clear Quartz

Silicon Dioxide (SiO2)

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

Identified July 18, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed in igneous, metamorphic, and sedimentary environments; commonly crystallizes from magma or precipitates from hydrothermal veins. Present throughout most geological eras.

Uses & applications

Used in watchmaking (oscillators), electronics, glass manufacturing, optical instruments, jewelry, and metaphysical practices.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Its name comes from the German word 'quarz', which originally meant 'hard'.

Field identification & locations

Identify by its hardness (scratches glass), lack of cleavage, and vitreous luster. Commonly found in riverbeds, mountains, and desert sands worldwide.