mineral

Quartz (Milky/Clear)

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Clear to white; Luster: Vitreous (glassy); Crystal structure: Hexagonal/Trigonal; Cleavage: None (Conchoidal fracture); Specific gravity: 2.65

Hardness: 7 on Mohs scale
Color: Clear to white
Luster: Vitreous (glassy)

Identified June 2, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Clear to white; Luster: Vitreous (glassy); Crystal structure: Hexagonal/Trigonal; Cleavage: None (Conchoidal fracture); Specific gravity: 2.65

Formation & geological history

Forms in all types of environments, most commonly from the crystallization of magma or from hydrothermal veins. It is found in igneous, metamorphic, and sedimentary rocks across all geological ages.

Uses & applications

Used widely in glassmaking, electronics (piezoelectric properties), abrasives, construction as sand/aggregate, and as a gemstone or specimen for collectors.

Geological facts

Quartz is one of the most abundant minerals in the Earth's continental crust. It is highly resistant to chemical and physical weathering.

Field identification & locations

Identify in the field by its hardness (it scratches glass), lack of cleavage, and characteristic glassy luster. Found globally in almost every mountainous or sandy environment.