mineral

Quartz Crystal

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Clear, white, gray, or various other colors depending on impurities; Luster: Vitreous (glassy); Crystal Structure: Trigonal system, typically forming six-sided prisms ending in a pyramid; Cleavage: None, exhibits conchoidal fracture; Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Luster: Vitreous (glassy)

Identified July 29, 2026More mineral →

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Physical properties

Formation & geological history

Formed mainly from silica-rich hydrothermal solutions in crustal fractures and pegmatites, as well as in igneous, metamorphic, and sedimentary rocks over millions of years.

Uses & applications

Used in jewelry, electronics (oscillators and timing devices), optical equipment, and as a popular specimen for mineral collectors.

Geological facts

Quartz is one of the most abundant and versatile minerals in the Earth's continental crust. Due to its piezoelectric properties, it generates an electrical charge under mechanical stress, which revolutionized watchmaking and radio technology.

Field identification & locations

Easily identified by its distinct hexagonal crystal habit, lack of cleavage, and ability to scratch glass due to its hardness of 7. Found globally in almost every geological environment.