mineral

Clear Quartz

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Clear to translucent milky white; Luster: Vitreous (glassy); Crystal Structure: Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65.

Hardness: 7 on Mohs scale
Color: Clear to translucent milky white
Luster: Vitreous (glassy)

Identified March 31, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Clear to translucent milky white; Luster: Vitreous (glassy); Crystal Structure: Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65.

Formation & geological history

Formed through the crystallization of magma or from hydrothermal veins. It occurs in almost all mineral environments and is a major constituent of many rock types. It can form in various geological ages from Precambrian to recent.

Uses & applications

Used widely in electronics for its piezoelectric properties, glassmaking, abrasives, and as a popular gemstone for jewelry and metaphysical collecting.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. It is often referred to as 'Rock Crystal' when found in pure, transparent form. Famous specimens are found in the Alps and Arkansas.

Field identification & locations

Identify in the field by its hardness (it can scratch glass), lack of cleavage, and often hexagonal crystal habit if not polished. It is ubiquitous but high-clarity specimens are most sought after by collectors.