mineral
Dyed Chalcedony (Agate)
Silicon Dioxide (SiO2) with artificial pigment
Hardness: 6.5-7 on Mohs scale. Color: Vivid magenta/purple (unnatural). Luster: Waxy to vitreous. Crystal structure: Cryptocrystalline. Cleavage: None. Fracture: Conchoidal. The specimen appears to have been artificially dyed to enhance its color for decorative purposes.
- Hardness
- 6
- Color
- Vivid magenta/purple (unnatural)
- Luster
- Waxy to vitreous
Identified More mineral →
Explore Dyed Chalcedony (Agate) in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6.5-7 on Mohs scale. Color: Vivid magenta/purple (unnatural). Luster: Waxy to vitreous. Crystal structure: Cryptocrystalline. Cleavage: None. Fracture: Conchoidal. The specimen appears to have been artificially dyed to enhance its color for decorative purposes.
Formation & geological history
Formed as a primary mineral in volcanic cavities or sedimentary environments where silica-rich fluids deposit. This specific specimen has undergone a post-extraction industrial dyeing process, where the naturally porous chalcedony absorbs colored pigments.
Uses & applications
Used primarily for home decor, garden stones, crystal healing collections, and low-cost jewelry findings.
Geological facts
Natural chalcedony is rarely this vibrant. The purple hue seen here is almost certainly the result of dye, a common treatment for agates and chalcedony that has been practiced since Roman times. The dye often concentrates in cracks and pores, which is a key diagnostic feature.
Field identification & locations
Identify by looking for uniform, overly saturated colors that do not follow natural banding patterns or that pool in surface depressions. Common locations for the natural base material include Brazil, Uruguay, and India.
More like this
Other mineral specimens
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Sandstone with Mineral Veining or Crust
Sedimentary Sandstone (mostly SiO2 with Fe2O3 tinting)
sedimentary
Schist
Schist
Metamorphic
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Gypsum (variety Selenite or Alabaster)
Calcium sulfate dihydrate (CaSO4·2H2O)
Mineral
Nephrite Jade
Nephrite
Mineral/Rock