mineral

Quartz (Druzy) on Matrix

Silicon Dioxide (SiO2)

Hardness: 7 Mohs scale; Color: Smoky grey/white translucent; Luster: Vitreous to dull; Crystal structure: Hexagonal (Trigonal); Cleavage: None/Conchoidal fracture; Specific gravity: 2.65.

Hardness: 7 Mohs scale
Color: Smoky grey/white translucent
Luster: Vitreous to dull

Identified July 20, 2026More mineral →

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Physical properties

Hardness: 7 Mohs scale; Color: Smoky grey/white translucent; Luster: Vitreous to dull; Crystal structure: Hexagonal (Trigonal); Cleavage: None/Conchoidal fracture; Specific gravity: 2.65.

Formation & geological history

Formed via hydrothermal precipitation in rock cavities or veins where silica-rich fluids cool and crystallize over geologic time.

Uses & applications

Commonly used as mineral specimens for collectors, in lapidary work, and historically as a source of silica for industrial manufacturing.

Geological facts

Druzy quartz consists of thousands of tiny crystals that form a glittering surface. It is one of the most common mineral varieties on Earth.

Field identification & locations

Identified by its hardness (scratches glass), lack of reaction to acid, and typical micro-crystalline habit. Found globally in almost every geological environment.