Mineral

Dyed Agate

Agate (Silicon Dioxide, SiO2)

Hardness: 6.5-7 on Mohs scale, Color: Artificially dyed bright blue, Luster: Vitreous, Crystal structure: Cryptocrystalline, Cleavage: None

Hardness: 6

Identified June 18, 2026More mineral →

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Physical properties

Hardness: 6.5-7 on Mohs scale, Color: Artificially dyed bright blue, Luster: Vitreous, Crystal structure: Cryptocrystalline, Cleavage: None

Formation & geological history

Formed as nodules in volcanic rocks or ancient lavas. The banding is natural, but this intense blue color is achieved through dyeing processes, common for commercial agate.

Uses & applications

Commonly used in jewelry making, ornamental objects, and carving.

Geological facts

Agate is known for its banding. Historically, agates were highly valued as talismans and amulets. Commercial dyeing of agates started in Idar-Oberstein, Germany in the 19th century.

Field identification & locations

Identified by its characteristic banding. Natural blue agates (like Blue Lace Agate) are pale; stark, vibrant blues are universally dyed. Often found worldwide, with major deposits in Brazil and Uruguay.