mineral

Quartz

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: typically white or colorless in small fragments; Luster: Vitreous; Crystal Structure: Hexagonal (Trigonal); Cleavage: Indistinct/Conchoidal fracture; Specific Gravity: 2.65.

Hardness: 7 on Mohs scale
Color: typically white or colorless in small fragments
Luster: Vitreous

Identified May 24, 2026More mineral →

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Physical properties

Formation & geological history

Forms in igneous, metamorphic, and sedimentary environments. It crystallizes from cooling magma or precipitates from hydrothermal veins. It is one of the most abundant minerals in the Earth's crust.

Uses & applications

Used in glassmaking, electronics (piezoelectric properties), abrasives, jewelry (gemstones), and as a component in construction materials like concrete and mortar.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. It is chemically and physically resistant to weathering. It has the ability to generate an electric voltage when mechanical stress is applied.

Field identification & locations

Identify in the field by its hardness (will scratch glass), conchoidal fracture (curved glass-like breaks), and lack of cleavage. Found globally in mountains, riverbeds, and beaches.