mineral
Dyed Agate
Chalcedony (SiO2)
Hardness: 6.5-7, Color: Bright artificial green with natural banding or fracture patterns visible, Luster: Vitreous to waxy, Crystal structure: Cryptocrystalline quartz, Cleavage: None
- Hardness
- 6
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Physical properties
Hardness: 6.5-7, Color: Bright artificial green with natural banding or fracture patterns visible, Luster: Vitreous to waxy, Crystal structure: Cryptocrystalline quartz, Cleavage: None
Formation & geological history
Formed in volcanic cavities or hot springs as a silica deposit. The bright green color is artificial, created by soaking the porous chalcedony in chemical dyes.
Uses & applications
Used primarily in inexpensive jewelry and decorative crafts.
Geological facts
Dyeing agate is a practice that dates back to the Roman era. The porosity of different bands determines how much dye is absorbed.
Field identification & locations
Identified by its unnatural, extremely bright color concentrated in fractures or specific bands.
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