mineral
Druzy Quartz (on Chalcedony/Agate base)
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 (Mohs scale); Color: Brownish-tan with clear crystals; Luster: Vitreous/sparkly; Crystal system: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture; Specific gravity: 2.65.
- Hardness
- 7 (Mohs scale)
- Color
- Brownish-tan with clear crystals
- Luster
- Vitreous/sparkly
Identified More mineral →
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Physical properties
Hardness: 7 (Mohs scale); Color: Brownish-tan with clear crystals; Luster: Vitreous/sparkly; Crystal system: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture; Specific gravity: 2.65.
Formation & geological history
Formed through hydrothermal precipitation where silica-rich fluids deposit tiny crystals in rock cavities or fractures. Typically found in volcanic vugs or sedimentary geodes.
Uses & applications
Primarily used in jewelry (pendants and rings) and by mineral collectors for its aesthetic sparkle.
Geological facts
The term 'druzy' (or druse) refers to a coating of fine crystals on a rock surface. This specific specimen appears to be a druzy coating over a chalcedony or agate base, giving it a 'sugar-coated' appearance.
Field identification & locations
Identify in the field by its distinct sparkle under light and high hardness (it will scratch glass). Often found in areas with past volcanic activity or in limestone deposits.
