sedimentary

Dyed Agate

Silicon Dioxide (SiO2) - Chalcedony variety

AI-generated identification · may be incorrect

Hardness: 6.5-7 Mohs; Color: Greyish-white base with artificial neon pink dye; Luster: Vitreous to waxy; Structure: Microcrystalline; Cleavage: None; Specific Gravity: 2.58-2.64

Hardness: 6
Color: Greyish-white base with artificial neon pink dye
Luster: Vitreous to waxy

Identified July 18, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 Mohs; Color: Greyish-white base with artificial neon pink dye; Luster: Vitreous to waxy; Structure: Microcrystalline; Cleavage: None; Specific Gravity: 2.58-2.64

Formation & geological history

Formed in cavities of volcanic rocks or ancient lavas, often as nodules or geodes. The artificial pink color is achieved through a chemical dyeing process after the stone is tumbled.

Uses & applications

Ornamental use, decorative stones, tumbled 'pocket' stones, and inexpensive jewelry.

Geological facts

Agate is naturally porous, which allows it to absorb mineral salts and chemical dyes easily. The pink color seen here does not occur naturally in this shade or distribution in agate/chalcedony.

Field identification & locations

Identify by looking for concentrations of color in cracks (dye pooling) or neon hues not found in nature. Commonly found in Brazil and Uruguay before being processed and dyed.