mineral

Dyed Agate

SiO2 (Silicon Dioxide)

Hardness 6.5-7 on Mohs scale, translucent to opaque, crystalline structure is cryptocrystalline. The bright green color is likely artificial (dyed) given the vibrant, unnatural saturation often seen in commercial agate slices. Luster is vitreous to waxy.

Identified June 18, 2026More mineral →

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Physical properties

Formation & geological history

Agates form primarily in volcanic and metamorphic rocks. Silica-rich fluids fill cavities in the host rock over millions of years, depositing layers of microcrystalline quartz. The coloring in this piece was likely added post-mining.

Uses & applications

Used primarily in jewelry, decorative items, and lapidary arts. This piece is shaped and drilled for use as a pendant or similar jewelry component.

Geological facts

Agate has been used for hardstone carving since antiquity. The practice of dyeing agates to enhance or change their color has been common since Roman times.

Field identification & locations

Identified by its waxy luster, translucency, and hardness. The artificially bright green color is a key indicator of dyeing. Highly common on the commercial market.