mineral

Drupa or Druzy Quartz on Geode Fragment

Crystalline Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 7 on Mohs scale; Color: White to translucent with tan/yellow center; Luster: Vitreous to sparkling; Crystal System: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture)

Hardness: 7 on Mohs scale
Color: White to translucent with tan/yellow center
Luster: Vitreous to sparkling

Identified July 1, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: White to translucent with tan/yellow center; Luster: Vitreous to sparkling; Crystal System: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture)

Formation & geological history

Formed by the precipitation of mineral-rich water in a rock cavity, often within volcanic or sedimentary environments. Age can range from millions to hundreds of millions of years.

Uses & applications

Commonly used in jewelry, as decorative collector pieces, or for metaphysical belief practices. Higher quality druses are used in faceted designs or pendants.

Geological facts

The term 'druzy' refers to a coating of fine crystals on a rock surface. In many cases, these are the inner linings of small geodes that have broken open.

Field identification & locations

Identify by the characteristic 'sugar-like' sparkle on the surface and the hardness of the base material. Often found in stream beds or limestone outcrops in regions like the Midwest USA or Brazil.