mineral

Dyed Agate Geode

Silicon Dioxide (SiO2) - Banded Chalcedony

Hardness: 6.5-7 on Mohs scale; Color: Artificially dyed bright teal/blue outer chalcedony bands with a central cavity lined with clear quartz druzy crystals; Luster: Vitreous to waxy; Crystal structure: Trigonal (microcrystalline); Cleavage: None, conchoidal fracture.

Hardness: 6
Luster: Vitreous to waxy

Identified July 27, 2026More mineral →

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Physical properties

Formation & geological history

Formed as secondary mineral deposits within cavities (vesicles) of volcanic rocks, where silica-rich fluids precipitated layers of chalcedony and macrocrystalline quartz. The vibrant blue color was added post-extraction via chemical dye.

Uses & applications

Mainly used as decorative display specimens, bookends, paperweights, lapidary art, and metaphysical crystals.

Geological facts

Agate is a porous form of chalcedony, which allows it to absorb artificial dyes deeply into its microcrystalline structure. Brazil, Uruguay, and Madagascar produce millions of agate geodes that are dyed in various vibrant colors for the global souvenir trade.

Field identification & locations

Identified by its distinctive concentric chalcedony banding, central hollow cavity lined with quartz crystals (druzy), and unnaturally intense blue-teal coloration indicative of dyeing.

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