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 12, 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 cooling of igneous magma. Can be found in almost all geological environments including igneous, metamorphic, and sedimentary rocks.

Uses & applications

Used in electronics for its piezoelectric properties, glassmaking, abrasives, jewelry (as a gemstone), and as a popular collector's mineral.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Its name comes from the Greek word 'krustallos' meaning ice, as ancient Greeks believed it was ice frozen so hard that it would never melt.

Field identification & locations

Identify by its ability to scratch glass (hardness 7), hexagonal crystal habit, and characteristic conchoidal fracture. Often found as veins in host rock or as secondary crystals in geodes.