mineral

Quartz Crystal

Silicon dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Clear to milky white; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

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

Identified July 15, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Clear to milky white; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Formation & geological history

Formed through the crystallization of magma or from hydrothermal veins. It is found in all types of geological environments and can be from any geological age, being one of the most abundant minerals in the Earth's crust.

Uses & applications

Used in electronics (oscillators), glassmaking, abrasives, jewelry, and as a popular collector's specimen due to its spiritual and aesthetic appeal.

Geological facts

Quartz is piezoelectric, meaning it generates an electric charge when mechanical pressure is applied. It is the primary component of most sand.

Field identification & locations

Identified by its crystal habit, its ability to scratch glass, and its lack of cleavage. Found worldwide, especially in mountainous regions and riverbeds.