mineral

Clear Quartz

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Colorless/Transparent; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: Indistinct/Conchoidal fracture; Specific Gravity: 2.65

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

Identified July 13, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Colorless/Transparent; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: Indistinct/Conchoidal fracture; Specific Gravity: 2.65

Formation & geological history

Quartz forms in a wide variety of environments, most commonly by crystallizing from molten magma (igneous), precipitating from hydrothermal veins, or through the recycling of silica in metamorphic and sedimentary processes. It is found in all geological ages.

Uses & applications

Extensively used in electronics (oscillators), glassmaking, abrasives, timekeeping components (watches), jewelry, and as a popular collector's mineral.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Its name comes from the German word 'Quarz' and crystals have been used historically as lenses and for focus.

Field identification & locations

Identified in the field by its hardness (scratches glass), lack of cleavage, conchoidal fracture, and hexagonal crystal habit. It is ubiquitous globally, especially in granite and sandstone terrains.