mineral

Blue Dyed Agate

Cryptocrystalline Quartz (SiO2)

Hardness: 6.5-7 Mohs; Color: Neon blue (artificially dyed); Luster: Vitreous to waxy; Crystal structure: Trigonal/Microcrystalline; Cleavage: None (conchoidal fracture); Specific gravity: 2.58-2.64

Hardness: 6
Color: Neon blue (artificially dyed)
Luster: Vitreous to waxy

Identified June 30, 2026More mineral →

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Physical properties

Hardness: 6.5-7 Mohs; Color: Neon blue (artificially dyed); Luster: Vitreous to waxy; Crystal structure: Trigonal/Microcrystalline; Cleavage: None (conchoidal fracture); Specific gravity: 2.58-2.64

Formation & geological history

Formed in cavities of volcanic rock or ancient lavas where silica-rich groundwater deposited layers of microcrystalline quartz over time. The vibrant blue color is not natural and was achieved through a chemical dying process after the stone was tumbled.

Uses & applications

Primarily used for decorative purposes, jewelry, metaphysical pocket stones, and as educational specimens for children.

Geological facts

Natural blue agate (like Blue Lace Agate) is usually a very pale periwinkle color. Intense, saturated neon blues like the one in the image are almost always the result of agate being porous enough to absorb synthetic dyes.

Field identification & locations

Identify in the field by looking for translucent, banded nodules in volcanic areas. To identify dyed specimens, look for concentrated color in cracks or a 'bleeding' effect where the dye has settled into the stone's microscopic pores.