mineral

Druzy Quartz

Crystalline Silicon Dioxide (SiO2)

Hardness: 7 Mohs; Color: Colorless to white/silver; Luster: Vitreous to Adamantine; Crystal structure: Trigonal/Hexagonal; Cleavage: None; SG: 2.65

Hardness: 7 Mohs
Color: Colorless to white/silver
Luster: Vitreous to Adamantine

Identified February 24, 2026More mineral →

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Physical properties

Hardness: 7 Mohs; Color: Colorless to white/silver; Luster: Vitreous to Adamantine; Crystal structure: Trigonal/Hexagonal; Cleavage: None; SG: 2.65

Formation & geological history

Formed when silica-rich water fills rock cavities and cools or evaporates, leaving behind a layer of tiny crystals. This usually occurs in high-temperature hydrothermal environments within volcanic host rocks.

Uses & applications

Primarily used in jewelry (rings, pendants) and decorative craft. It is highly valued by mineral collectors for its unique glittering surface.

Geological facts

The term 'druzy' refers to the coating of tiny crystals on a rock surface. It is often created over millions of years and is popular in jewelry due to its natural sparkle that resembles sugar or snow.

Field identification & locations

Identified by a carpet-like layer of tiny, sparkling quartz points within a host geode or cavity. Commonly found in Brazil, Uruguay, and various locations in the United States.