mineral
Dyed Agate
SiO2 (Chalcedony/Agate)
AI-generated identification · may be incorrectHardness: 6.5-7 on Mohs scale. Color: Artificially dyed blue. Luster: Vitreous/waxy. Crystal structure: Cryptocrystalline. Cleavage: None. Specific gravity: 2.58-2.64.
- Hardness
- 6
- Color
- Artificially dyed blue
- Luster
- Vitreous/waxy
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Physical properties
Hardness: 6.5-7 on Mohs scale. Color: Artificially dyed blue. Luster: Vitreous/waxy. Crystal structure: Cryptocrystalline. Cleavage: None. Specific gravity: 2.58-2.64.
Formation & geological history
Agate is formed in volcanic rocks or ancient lavas where silica-rich fluids fill cavities. The blue color in this specimen is the result of artificial dyeing processes used on gray or white natural agate.
Uses & applications
Commonly used in jewelry, crafts, tumbling, and as decorative pieces.
Geological facts
Dyeing agate is a practice that dates back to the ancient Romans, who figured out how to artificially color these porous stones.
Field identification & locations
Identified by its waxy luster, conchoidal fracture, and often banding (though faint here). The intense, sometimes unnatural blue color indicates dye. Commonly found worldwide, especially in Brazil and Uruguay.
