description Atacamite Overview
Atacamite is a copper chloride hydroxide mineral with the chemical formula Cu2Cl(OH)3. It commonly forms green crystals or granular coatings in the oxidized zones of copper deposits, especially in dry environments where copper minerals react with chloride-bearing fluids. Its vivid green color and copper content make it of interest to mineral collectors and to geologists studying secondary ore minerals.
help Atacamite FAQ
How good is Atacamite?
Atacamite scores 5.78/10 (Mediocre) on Lunoo, making it rated in the Gemstone category. Emerald-green copper mineral has specimen appeal; softness, instability, and limited faceting reduce gemstone status.
What are the best alternatives to Atacamite?
See our alternatives page for Atacamite for a ranked list with scores. Top alternatives include: Pumpellyite, Ekanite, Green Diamond.
How does Atacamite compare to Pumpellyite?
See our detailed comparison of Atacamite vs Pumpellyite with scores, features, and an AI-powered verdict.
Is Atacamite worth it in 2026?
With a score of 5.78/10, Atacamite is a solid option in Gemstone. See all Gemstone ranked.
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