mineral

Clear Quartz

Silicon Dioxide (SiO2)

Hardness: 7 on the Mohs scale; Color: Colorless/Transparent; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (Trigonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65.

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

Identified April 9, 2026More mineral →

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Physical properties

Hardness: 7 on the 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 and crystallization of silica-rich magma or from hydrothermal veins. It can be found in igneous, metamorphic, and sedimentary environments worldwide, often dating back hundreds of millions of years.

Uses & applications

Used extensively in the electronics industry (piezoelectric properties), glassmaking, abrasives, and as a gemstone for jewelry, carvings, and crystal healing collections.

Geological facts

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

Field identification & locations

Identify in the field by its hardness (will scratch glass), lack of cleavage, and transparent-to-white appearance. Common in granite pockets or as stream-tumbled pebbles. Collectors should look for internal clarity and terminal crystal faces.