mineral
Blue Dyed Agate Geode (Slice)
Silicon Dioxide (SiO2) - Chalcedony / Quartz
Hardness: 6.5-7 Mohs; Color: Naturally white, grey, or brown, artificially dyed deep blue; Luster: Vitreous to waxy; Structure: Cryptocrystalline with macro-crystalline quartz center; Cleavage: None (Conchoidal fracture).
- Hardness
- 6
- Color
- Naturally white, grey, or brown, artificially dyed deep blue
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7 Mohs; Color: Naturally white, grey, or brown, artificially dyed deep blue; Luster: Vitreous to waxy; Structure: Cryptocrystalline with macro-crystalline quartz center; Cleavage: None (Conchoidal fracture).
Formation & geological history
Formed in volcanic rock cavities (vesicles) where silica-rich fluids deposited layers over time. This specimen has been sliced and artificially dyed, most likely originating from the Rio Grande do Sul region in Brazil.
Uses & applications
Used primarily for decorative items, coasters, jewelry, and metaphysical collecting.
Geological facts
Natural blue agate exists (like Blue Lace Agate), but this intense neon/navy hue is achieved through a chemical dye process. Agate is a variety of chalcedony that shows banding.
Field identification & locations
Identify by looking for concentrated dye in cracks or band lines. Real agate is found in volcanic regions worldwide. Collectors look for unique banding patterns and natural colors.
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