mineral

Quartz (Druzy)

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 7 on Mohs scale; Color: Colorless to white/cream; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65.

Hardness: 7 on Mohs scale
Color: Colorless to white/cream
Luster: Vitreous to greasy

Identified June 25, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Colorless to white/cream; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65.

Formation & geological history

Formed through the precipitation of silica from hydrothermal fluids in rock cavities, fractures, or geodes. The tiny crystals (druze) grow over a host rock or mineral base.

Uses & applications

Used extensively in jewelry (pendants and rings), decorative ornaments, and by mineral collectors. Pure quartz is also vital in electronics and glass manufacturing.

Geological facts

The term 'druzy' refers to a coating of fine crystals on a rock fracture or geode. Quartz is the most common mineral on Earth's continental crust.

Field identification & locations

Identified by its sparkling 'sugar-like' appearance and high hardness (it will scratch glass). Commonly found in volcanic regions and sedimentary basins worldwide.