mineral

Clear Quartz

Silicon dioxide (SiO2)

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

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

Identified April 7, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed from cooling silica-rich hydrothermal fluids or magma in veins and pegmatites. It is found in a wide variety of igneous, metamorphic, and sedimentary environments throughout many geological ages.

Uses & applications

Extensively used in electronics for its piezoelectric properties, glassmaking, abrasive manufacturing, semi-precious jewelry, and as a popular specimen for mineral collectors.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. It is highly resistant to chemical and physical weathering. Famous localities include Arkansas, USA and Minas Gerais, Brazil.

Field identification & locations

Identify in the field by its hardness (will scratch glass), lack of cleavage, hexagonal crystal habit, and conchoidal fracture. Commonly found in gravel beds, quartz veins, and as a primary component of granite.