mineral

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

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

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

Identified June 9, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Colorless to milky white; 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 found in all three rock types (igneous, sedimentary, and metamorphic) across all geological ages.

Uses & applications

Widely used in glassmaking, electronics (piezoelectric properties), abrasives, jewelry (as semi-precious gemstones), and as a popular collector's specimen.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. While the social media tag in the image suggests 'diamond,' the visual features like the fracture pattern and luster are far more consistent with quartz.

Field identification & locations

Identify in the field by its hardness (it will scratch glass but cannot be scratched by a steel knife) and its lack of cleavage. Found globally in mountains, riverbeds, and mines.