mineral

Dyed Chalcedony (Agate)

Silicon Dioxide (SiO2) with artificial pigment

AI-generated identification · may be incorrect

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 July 10, 2026More mineral →

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Physical properties

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.