mineral

Quartz / Clear Quartz

Silicon Dioxide (SiO2)

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

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

Identified May 9, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed through the cooling of magma or precipitation from hydrothermal veins. It is a major component of igneous rocks like granite and metamorphic rocks like quartzite. It can be found in almost all geological environments and ages.

Uses & applications

Used in glass manufacturing, electronics (piezoelectric properties), abrasives, jewelry (gemstones), and as a popular specimen for mineral collectors.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. It is piezoelectric, meaning it generates an electric charge in response to applied mechanical stress, which is why it is used in watches and clocks.

Field identification & locations

Identify in the field by its hardness (cannot be scratched by a steel knife) and lack of cleavage. Found globally, especially in mountain ranges and riverbeds. Look for hexagonal crystal points and glassy luster.