mineral

Quartz

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: White/Translucent; Luster: Vitreous (glassy); Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: White/Translucent
Luster: Vitreous (glassy)

Identified June 2, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: White/Translucent; 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. It crystallizes from cooling magma or hydrothermal veins and is highly resistant to weathering. Found in rocks of all ages.

Uses & applications

Used in glassmaking, electronics (piezoelectric properties), abrasives, construction aggregates, and as gemstones in jewelry.

Geological facts

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

Field identification & locations

Identified in the field by its hardness (it scratches glass), lack of cleavage, and glassy appearance. Found globally in almost all geological environments.