mineral

Clear Quartz

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 May 7, 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 from silica-rich hydrothermal veins and as a primary constituent in igneous rocks like granite. It crystallizes from cooling magma or precipitates from hot aqueous solutions. It can be found in rocks from virtually all geological ages.

Uses & applications

Used in electronics (as piezoelectric crystal), glassmaking, precision instruments, jewelry (as semi-precious gemstones), and highly valued as metaphysical or collection specimens.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. It is chemically and physically very stable, which is why it persists as sand on beaches around the world.

Field identification & locations

Identify by its ability to scratch glass (hardness 7), hexagonal crystal habit, and characteristic conchoidal fracture. Commonly found in mountainous regions worldwide, including Arkansas (USA), Brazil, and Madagascar.