mineral
Aura Druzy Agate (Star Shape)
Silicon Dioxide (SiO2) with Titanium/Metal Vapor Coating
Hardness: 6.5-7 Mohs; Color: Iridescent purple and blue; Luster: Vitreous to pearly; Crystal structure: Trigonal (microcrystalline); Features a druzy pocket of small sparkling crystals.
- Hardness
- 6
- Color
- Iridescent purple and blue
- Luster
- Vitreous to pearly
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Physical properties
Hardness: 6.5-7 Mohs; Color: Iridescent purple and blue; Luster: Vitreous to pearly; Crystal structure: Trigonal (microcrystalline); Features a druzy pocket of small sparkling crystals.
Formation & geological history
Formed as secondary deposits in volcanic rock cavities (vesicles) where silica-rich fluids cooled. This modern piece has been mechanically carved into a star and treated with a thin layer of metallic vapor in a vacuum chamber.
Uses & applications
Metaphysical collecting, decorative display, and jewelry making.
Geological facts
The iridescent sheen is created via a process called 'Vacuum Deposition,' where atoms of gold, titanium, or other metals are bonded to the surface of the stone at a molecular level.
Field identification & locations
Identify by the characteristic concentric banding of agate or the presence of a druzy pocket, combined with an artificial rainbow-metallic finish. Native druzy agate is found globally in Brazil, Uruguay, and India.
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