mineral

Dyed Agate

Silicon Dioxide (SiO2) with synthetic dyes

Hardness: 6.5-7; Color: Bright magenta/purple (unnatural); Luster: Vitreous/Waxy; Structure: Microcrystalline; Cleavage: None (conchoidal fracture); Specific Gravity: 2.58-2.64.

Hardness: 6
Color: Bright magenta/purple (unnatural)
Luster: Vitreous/Waxy

Identified March 28, 2026More mineral →

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Physical properties

Hardness: 6.5-7; Color: Bright magenta/purple (unnatural); Luster: Vitreous/Waxy; Structure: Microcrystalline; Cleavage: None (conchoidal fracture); Specific Gravity: 2.58-2.64.

Formation & geological history

Formed as a cryptocrystalline variety of silica, typically in volcanic rock cavities or ancient lava flows. The intense color is achieved through a secondary artificial dyeing process to enhance market appeal.

Uses & applications

Commonly used for tumbled stones, decorative ornaments, low-cost jewelry, and metaphysical healing collections.

Geological facts

Natural agate is rarely this vibrant. The dyeing of agates dates back to the Roman Empire; however, modern chemical dyes allow for neon-like colors that are not found in nature.

Field identification & locations

Identify in the field by looking for 'spider-web' patterns of darker dye concentrated in fractures. Natural agates usually have more muted, earthy tones (browns, whites, reds). Commonly found in Brazil, India, and the USA (before processing).

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