mineral

Quartz Crystal Fragment

Quartz (Silicon Dioxide, SiO2)

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

Hardness: 7 on Mohs scale
Color: Colorless to white/gray
Luster: Vitreous (glassy)

Identified June 2, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed through the cooling of silica-rich magma or from hydrothermal veins. It is one of the most abundant minerals in the Earth's crust and can be found in igneous, metamorphic, and sedimentary environments.

Uses & applications

Used in electronics (as oscillators), glassmaking, abrasives, and as semi-precious gemstones in jewelry. Large specimens are popular among collectors.

Geological facts

Quartz is piezoelectric, meaning it generates an electric charge in response to applied mechanical stress. This property led to its use in clocks and radios.

Field identification & locations

Identify by its hardness (scratches glass), glassy luster, and lack of cleavage. This specific fragment shows the typical transparency and irregular fracture surface of common quartz.

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