mineral

Quartz (Clear or Cloudy)

Silicon Dioxide (SiO2)

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

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

Identified June 1, 2026More mineral →

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Physical properties

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

Formation & geological history

Forms in igneous, metamorphic, and sedimentary environments. Primarily crystallizes from cooling magma or hydrothermal veins. It is found in rocks of almost all ages globally.

Uses & applications

Extensively used in electronics (oscillators), glassmaking, abrasives, jewelry (gemstones), and construction as an ingredient in mortar and concrete.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. It is piezoelectric, meaning it can generate an electrical charge when mechanical stress is applied.

Field identification & locations

Identified in the field by its hardness (scratches glass), lack of cleavage, and conchoidal fracture. Common in gravel, riverbeds, and as a major component of granite.