mineral
Dyed Agate
Silicon Dioxide (SiO2) with artificial pigment
AI-generated identification · may be incorrectHardness: 6.5–7 (Mohs scale); Color: Intense fuchsia/magenta (dyed); Luster: Vitreous to waxy; Crystal structure: Trigonal (microcrystalline); Cleavage: None; Specific gravity: 2.58–2.64
- Hardness
- 6
- Color
- Intense fuchsia/magenta (dyed)
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5–7 (Mohs scale); Color: Intense fuchsia/magenta (dyed); Luster: Vitreous to waxy; Crystal structure: Trigonal (microcrystalline); Cleavage: None; Specific gravity: 2.58–2.64
Formation & geological history
Formed as chalcedony in volcanic rock cavities (vugs) via silica-rich groundwater. The intense pink color is achieved post-extraction through a chemical dyeing process, as this hue does not occur naturally in agate.
Uses & applications
Used primarily for decorative items, jewelry (beads, pendants), and as 'pocket stones' for collectors or gift shops.
Geological facts
Agate is porous, which allows it to absorb liquid dyes. This has been a common practice in the gemstone industry for centuries, especially with specimens from Brazil and Uruguay.
Field identification & locations
Identify in the field by its banded structure and conchoidal fracture. For dyed specimens, the color often concentrates in cracks or bands. Common in many geological settings worldwide, particularly basalt flows.
