mineral

Quartz

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Colorless to white/translucent; Luster: Vitreous (glassy); Crystal structure: Hexagonal/Trigonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65.

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

Identified May 17, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Colorless to white/translucent; 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 magma or precipitation from hydrothermal veins. It is found in all geological environments and can be from any geological age, primarily within continental crust.

Uses & applications

Widely used glassmaking, electronics (piezoelectric properties), abrasives, gemstone jewelry, and as a durable component in construction and landscaping.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. It is highly resistant to both mechanical and chemical weathering, which is why it is the primary component of most beach sand.

Field identification & locations

Identify in the field by its hardness (it can scratch glass), its lack of cleavage, and its vitreous luster. Commonly found in riverbeds, mountains, and as crystals in vugs.