mineral

Blue Dyed Agate

Silicon Dioxide (SiO2)

Hardness: 6.5-7 (Mohs scale), Color: Vivid blue (dyed) with white/grey bands, Luster: Vitreous to waxy, Crystal Structure: Trigonal (microcrystalline chalcedony), Cleavage: None, Specific Gravity: 2.58–2.64

Hardness: 6

Identified April 4, 2026More mineral →

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Physical properties

Formation & geological history

Formed in volcanic rock cavities from silica-rich groundwater. Natural agate bands are millions of years old, often from the Cenozoic era. The blue color in this specimen is achieved through a secondary chemical dyeing process using iron or Prussian blue salts.

Uses & applications

Used primarily in jewelry (pendants, beads), home decor (coasters, wind chimes), and as metaphysical healing stones.

Geological facts

Agate is a variety of chalcedony. While natural blue agate (Blue Lace Agate) exists, it is usually a very pale pastel blue; the vivid neon blue seen here is a classic hallmark of dyed Brazilian agate.

Field identification & locations

Identify in the field by its distinctive concentric banding and lack of cleavage. In its natural state, it often looks like a potato-shaped nodule. Dyed versions are easily identified by their unnaturally bright saturation.