mineral

Pink Dyed Agate (Banded Chalcedony)

Silicon dioxide (SiO2) - variety Chalcedony

AI-generated identification · may be incorrect

Hardness: 6.5–7 on the Mohs scale; Color: Naturally grey/white with artificial shocking pink dye; Luster: Waxy to vitreous; Crystal structure: Trigonal (microcrystalline); Cleavage: None; Specific gravity: 2.58–2.64.

Hardness: 6
Color: Naturally grey/white with artificial shocking pink dye
Luster: Waxy to vitreous

Identified March 31, 2026More mineral →

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Physical properties

Formation & geological history

Formed as nodules in volcanic rocks or certain metamorphic rocks where silica-rich groundwater fills cavities and deposits layers of microcrystalline quartz over thousands of years. Natural ages vary widely from millions to over a billion years.

Uses & applications

Used primarily as decorative items such as coasters, wind chimes, bookends, and in jewelry making (pendants and beads). It is also used historically for mortar and pestles due to its hardness.

Geological facts

This specific neon pink color does not occur naturally in agate; it is achieved through an industrial dyeing process where the porous bands of the specimen absorb chemical dyes. Agate was named by the Greek philosopher Theophrastus after the Achates River in Sicily.

Field identification & locations

Identify by distinct concentric or parallel banding and a waxy surface. In the field, look for nodules with a rough, 'cauliflower' or pitted exterior. Common globally, notably in Brazil and Uruguay. Collectors should note that neon colors indicate human enhancement.