mineral
Gray Agate with Druzy Quartz Geode
Cryptocrystalline Quartz (SiO2)
AI-generated identification · may be incorrectMohs hardness: 6.5-7; Color: Gray, bluish-gray; Luster: Waxy to vitreous; Crystal structure: Trigonal/Microcrystalline; Cleavage: None; Specific Gravity: 2.58-2.64
- Hardness
- 6
- Color
- Gray, bluish-gray
- Luster
- Waxy to vitreous
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Physical properties
Mohs hardness: 6.5-7; Color: Gray, bluish-gray; Luster: Waxy to vitreous; Crystal structure: Trigonal/Microcrystalline; Cleavage: None; Specific Gravity: 2.58-2.64
Formation & geological history
Formed in cavities of volcanic host rocks through the deposition of silica from groundwater. The internal cavity contains a druzy druse of tiny quartz crystals.
Uses & applications
Ornamental carvings, decorative items, jewelry, and metaphysical collecting.
Geological facts
Agate is a variety of chalcedony. This specific piece is a 'druzy agate', where the internal hollow of a geode has been exposed and carved into an owl shape.
Field identification & locations
Identified by its waxy luster, translucency, and the presence of micro-crystals in the pocket (vug). Common in Brazil, Uruguay, and India.
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