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 July 21, 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 through the cooling of silica-rich magma or from hydrothermal solutions in veins. It can be found in igneous, metamorphic, and sedimentary environments globally, often millions of years old.

Uses & applications

Extensively used in electronics (oscillators), glassmaking, jewelry, sandpaper, and as a popular specimen for gemstone collectors and metaphysical use.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Pure clear quartz is also known as 'Rock Crystal' and was once believed by ancient Greeks to be ice that had frozen so hard it would never melt.

Field identification & locations

Identified in the field by its distinct hexagonal crystal habit, hardness (it scratches glass), and lack of cleavage. Common in pegmatites and mountain ranges like the Alps, Andes, and Arkansas (USA).