mineral

Dyed Agate Geode Slice

Silicon Dioxide (SiO2)

Hardness: 6.5-7 Mohs; Color: Naturally grey/white but artificially dyed pink/purple; Luster: Vitreous to waxy; Structure: Cryptocrystalline quartz; Cleavage: None (conchoidal fracture); Specific Gravity: 2.58-2.64

Hardness: 6
Color: Naturally grey/white but artificially dyed pink/purple
Luster: Vitreous to waxy

Identified July 4, 2026More mineral →

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Physical properties

Formation & geological history

Formed as a geode within volcanic rock cavities where silica-rich groundwater deposited layers of quartz over long periods. This specific specimen has been sliced, polished, and artificially dyed.

Uses & applications

Commonly used for home decor, paperweights, healing crystals, and lapidary art.

Geological facts

The vibrant pink and purple hues in this specimen are the result of chemical dyes; natural agate is rarely this saturated. The small hollow center with tiny crystals is called a druzy cavity.

Field identification & locations

Identify by the concentric 'fortification' banding and the rough, rocky exterior crust (cortex). Often found in basaltic regions of Brazil and Uruguay.