mineral

Blue Dyed Agate

Silicon Dioxide (SiO2) with artificial pigment

Hardness: 6.5-7 (Mohs scale); Color: Neon blue/Indigo; Luster: Vitreous/Waxy; Crystal Structure: Trigonal/Microcrystalline; Cleavage: None; Specific Gravity: 2.58-2.64

Hardness: 6
Color: Neon blue/Indigo
Luster: Vitreous/Waxy

Identified May 23, 2026More mineral →

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Physical properties

Hardness: 6.5-7 (Mohs scale); Color: Neon blue/Indigo; Luster: Vitreous/Waxy; Crystal Structure: Trigonal/Microcrystalline; Cleavage: None; Specific Gravity: 2.58-2.64

Formation & geological history

Formed in volcanic rock cavities from silica-rich groundwater. Agate naturally forms over millions of years, though the vivid blue color is achieved through a modern chemical dyeing process.

Uses & applications

Commonly used for decorative ornaments, jewelry (beads, pendants), worry stones, and aquarium gravel.

Geological facts

Agate is naturally gray, brown, or white; vivid 'electric' blues are almost always the result of soaking the porous rock in an iron-based solution or inorganic salts.

Field identification & locations

Field identification focuses on its waxy luster, conchoidal fracture, and translucency. Often found in riverbeds or volcanic regions like Brazil and Uruguay.

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