mineral

Clear Quartz Crystal

Quartz (Silicon Dioxide, SiO2)

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

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

Identified June 21, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed from silica-rich hydrothermal solutions or the cooling of igneous magma. It is one of the most common minerals in the Earth's crust, found in all types of geological environments and ages.

Uses & applications

Used in electronics (for its piezoelectric properties), glass manufacturing, watchmaking, jewelry, and as a popular specimen for gemstone collectors.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. It was historically believed by many cultures to be eternal ice that would never melt.

Field identification & locations

Identify by its six-sided prismatic shape, lack of cleavage, and ability to scratch glass easily. Found globally, with notable deposits in Brazil and Arkansas, USA.