mineral

Dyed Agate

SiO2 (Chalcedony/Agate)

AI-generated identification · may be incorrect

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.

Hardness: 6
Color: Artificially dyed blue
Luster: Vitreous/waxy

Identified September 24, 2026More mineral →

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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.