mineral

Clear Quartz Crystal

Quartz (Silicon Dioxide - SiO2)

Hardness: 7 on Mohs scale; Color: Colorless/Transparent; Luster: Vitreous (glass-like); Crystal structure: Trigonal (hexagonal prisms); Cleavage: None (conchoidal fracture); Specific gravity: 2.65.

Hardness: 7 on Mohs scale
Color: Colorless/Transparent
Luster: Vitreous (glass-like)

Identified April 3, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Colorless/Transparent; Luster: Vitreous (glass-like); Crystal structure: Trigonal (hexagonal prisms); Cleavage: None (conchoidal fracture); Specific gravity: 2.65.

Formation & geological history

Formed through the crystallization of silica-rich hydrothermal solutions or the cooling of silica-rich magma. It is found in igneous, metamorphic, and sedimentary environments worldwide, dating from all geological eras.

Uses & applications

Used in electronics (oscillators), glassmaking, abrasives, jewelry (gemstones), and as decorative/healing crystal specimens.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. It is piezoelectric, meaning it generates an electric charge when mechanical pressure is applied, which is why it is used in watches and radios.

Field identification & locations

Identify in the field by its hexagonal crystal habit, its ability to scratch glass (hardness 7), and the lack of cleavage planes. Found globally in mountainous regions and riverbeds.

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