mineral

Clear Quartz

Silicon dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Colorless/Transparent; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: None/Conchoidal fracture; Specific gravity: 2.65

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

Identified July 2, 2026More mineral →

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Physical properties

Hardness: 7 on 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 crystallization of silica-rich hydrothermal solutions or the cooling of magma in igneous rocks like pegmatites. It is one of the most abundant minerals in the Earth's crust.

Uses & applications

Used in electronics (oscillators), glassmaking, abrasives, jewelry (as semi-precious stones), and widely collected for metaphysical or decorative purposes.

Geological facts

Quartz is piezoelectric, meaning it generates an electric charge when mechanical pressure is applied. It is the defining mineral for a hardness of 7 on the Mohs scale.

Field identification & locations

Identify in the field by its ability to scratch glass, its lack of cleavage (it breaks in curved, shell-like patterns), and its six-sided crystal habit. Found globally in almost all geological environments.