mineral

Quartz (Milky/Rose variety)

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: White to pale pink/tan; Luster: Vitreous (glassy) to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: White to pale pink/tan
Luster: Vitreous (glassy) to greasy

Identified June 18, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: White to pale pink/tan; Luster: Vitreous (glassy) to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Formation & geological history

Forms in igneous rocks like granite through cooling magma or in hydrothermal veins where mineral-rich hot water deposits crystals into crevices. It is found in geological formations across all ages.

Uses & applications

Used in glassmaking, electronics (piezoelectric properties), abrasives, and as semi-precious gemstones in jewelry or for decorative home decor.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Pure quartz is colorless, but impurities and inclusions create the wide variety of colors seen in specimens like this one.

Field identification & locations

Identify by its ability to scratch glass and lack of cleavage. Look for hexagonal crystal faces in larger specimens. Extremely common globally in mountains, rivers, and beaches.