mineral

Clear Quartz

Silicon Dioxide (SiO2)

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

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

Identified May 25, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed through the crystallization of silica-rich magma or via hydrothermal activity in veins. It is found in all types of geological environments and can be billions of years old.

Uses & applications

Used in electronics for its piezoelectric properties, glass manufacturing, watches, abrasives, jewelry, and as a popular metaphysical or decorative specimen.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Pure quartz, like this specimen, is often called 'rock crystal' and was once believed by ancient Greeks to be ice that had frozen so hard it would never melt.

Field identification & locations

Identify by its ability to scratch glass, its lack of cleavage (breaking in curved, shell-like patterns), and its transparency. Found globally, especially in mountainous regions or sandy environments.