mineral
Druzy Chalcedony (Agate Geode)
Silica (SiO2) - Cryptocrystalline Quartz with druzy macrocrystalline quartz
AI-generated identification · may be incorrectHardness: 6.5-7 (Mohs scale), Color: Translucent white/gray, Luster: Waxy to vitreous (sparkling druzy), Crystal Structure: Trigonal/Hexagonal, Cleavage: None, Specific Gravity: 2.58-2.64
- Hardness
- 6
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Physical properties
Hardness: 6.5-7 (Mohs scale), Color: Translucent white/gray, Luster: Waxy to vitreous (sparkling druzy), Crystal Structure: Trigonal/Hexagonal, Cleavage: None, Specific Gravity: 2.58-2.64
Formation & geological history
Formed via secondary deposition of silica-rich fluids in volcanic rock cavities or sedimentary nodes. The outer layer is chalcedony (cryptocrystalline), while the inner druzy is macrocrystalline quartz.
Uses & applications
Commonly used in jewelry, as decorative focal points, metaphysical healing practices, and as collector specimens.
Geological facts
The term 'druzy' refers to the tiny glittering crystals that cover a host rock. This specimen has been carved and polished into a heart shape to highlight the natural cavity.
Field identification & locations
Identify by the sparkling 'sugar-like' crystals in the center and the smooth, waxy chalcedony border. Commonly found in Brazil, Uruguay, and India.
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