mineral

Quartz (Clear Quartz/Rock Crystal)

Silicon Dioxide (SiO2)

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

Hardness: 7 on the Mohs scale
Color: Colorless/Transparent
Luster: Vitreous (glassy)

Identified March 21, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed through the cooling of silica-rich magma or from hydrothermal veins. It is found in all geological ages and environments, notably in igneous pegmatites and metamorphic rocks.

Uses & applications

Used in electronics (oscillators), glassmaking, abrasives, construction (sand), and as gemstones in jewelry or spiritual collecting.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. It is piezoelectric, meaning it generates an electric charge in response to applied mechanical stress.

Field identification & locations

Identify by its ability to scratch glass and its lack of cleavage (it breaks into irregular, curved shards). Found globally; look for clear, glassy grains in riverbeds or within granite outcrops.

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