mineral

Dyed Agate

Silicon Dioxide (SiO2)

Hardness: 6.5-7 on Mohs scale. Color: Deep magenta and purple (artificially dyed). Luster: Vitreous to waxy. Crystal Structure: Hexagonal (cryptocrystalline). Cleavage: None. Specific Gravity: 2.58-2.64.

Hardness: 6
Color: Deep magenta and purple (artificially dyed)
Luster: Vitreous to waxy

Identified May 10, 2026More mineral →

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Physical properties

Formation & geological history

Formed in volcanic cavities or sedimentary rocks through the deposition of silica from groundwater. The intense color is achieved through a multi-step chemical dyeing and heating process after the stone is tumbled.

Uses & applications

Used primarily for decorative items, inexpensive jewelry, worry stones, pocket charms, and as educational specimens for children.

Geological facts

Agate is naturally porous, allowing it to soak up chemical dyes like a sponge. While natural agates are often grey or brown, they have been dyed since Roman times to enhance their visual appeal.

Field identification & locations

Identify by looking for unnatural, neon, or vibrant colors that do not occur in nature, especially concentrated in cracks or bands. Commonly found in rock shops and souvenir stores worldwide.