mineral

Dyed Agate

Chalcedony (Silicon Dioxide, SiO2)

Hardness: 6.5–7 on Mohs scale; Color: Naturally grey, white, or brown but here dyed vibrant pink/purple; Luster: Vitreous to waxy; Crystal structure: Trigonal (microcrystalline); Cleavage: None; Specific Gravity: 2.58–2.64

Hardness: 6
Luster: Vitreous to waxy

Identified March 25, 2026More mineral →

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Physical properties

Formation & geological history

Formed in cavities of volcanic rocks or ancient lavas, where silica-rich groundwater deposits layers of chalcedony over millions of years. These specific specimens have undergone a secondary artificial process of tumbling and chemical dyeing.

Uses & applications

Primarily used for decorative purposes, costume jewelry, healing stones, and educational mineral sets for children.

Geological facts

Agate is porous, which allows it to absorb chemical dyes easily. While the banding and structure are millions of years old, the neon pink and purple colors seen in these specimens do not occur naturally in agate.

Field identification & locations

Identify by a waxy luster and characteristic banding or 'mossy' inclusions visible through the translucent surface. These tumbled stones are common in gift shops and amateur 'rock hound' starter kits worldwide.