mineral

Dyed Agate Slice

Chalcedony (Silicon Dioxide, SiO2) with artificial pigment

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale); Color: Artificial forest green (originally gray/white); Luster: Vitreous/Waxy; Structure: Cryptocrystalline; Cleavage: None (Conchoidal fracture); Specific Gravity: 2.60-2.65

Hardness: 6
Color: Artificial forest green (originally gray/white)
Luster: Vitreous/Waxy

Identified July 7, 2026More mineral →

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Physical properties

Formation & geological history

Formed as secondary deposits of silica in cavities within volcanic lavas or metamorphic rocks. This specific specimen has been sliced and chemically dyed to achieve the deep green color, which is not natural to this specific agate variety.

Uses & applications

Used primarily for ornamental purposes, coasters, home decor, jewelry, and as educational specimens for collectors.

Geological facts

The practice of dyeing agate dates back to Roman times; the stone is porous enough to absorb pigments deep into its crystalline structure. Natural green agate is usually moss agate or chrysoprase, which look significantly different from this dyed piece.

Field identification & locations

Identify in the field by looking for translucent nodding rocks with a rough, pitted exterior. For dyed pieces, identification is based on the 'unnatural' intensity and saturation of the color often concentrated in specific bands or cracks.