mineral

Dyed Purple Agate

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Hardness: 6.5–7 (Mohs scale); Color: Artificial deep purple with white/grey banding; Luster: Vitreous to waxy; Structure: Microcrystalline; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.6

Hardness: 6
Color: Artificial deep purple with white/grey banding
Luster: Vitreous to waxy

Identified March 20, 2026More mineral →

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Physical properties

Hardness: 6.5–7 (Mohs scale); Color: Artificial deep purple with white/grey banding; Luster: Vitreous to waxy; Structure: Microcrystalline; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.6

Formation & geological history

Formed in volcanic rock cavities (vesicles) where silica-rich groundwater deposited layers of microcrystalline quartz over thousands of years. Natural agate is often millions of years old, primarily from basaltic lava flows.

Uses & applications

Used primarily for decorative purposes, bookends, jewelry (cabochons), paperweights, and metaphysical healing collections.

Geological facts

While the rock structure is natural agate, the intense neon purple color is produced by soaking the porous stone in chemical dyes. Agate has been used by humans since the Neolithic era and was historically valued as a protective amulet.

Field identification & locations

Identify in the field by look-alike exterior nodules often resembling ordinary 'lumpy' rocks. Note that neon purple does not occur naturally in this saturation in agate. Common locations include Brazil, Uruguay, and various parts of the USA (Lake Superior, Oregon).

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