Adamite
“Neon yellow-green zinc crystals”
Adamite is a zinc arsenate hydroxide mineral known for its bright yellow-green to lime-green color and its striking fluorescence under ultraviolet light. It forms in the oxidized zones of zinc and arsenic-bearing ore deposits and produces delicate, radiating crystal sprays highly prized by collectors.
zinc arsenate hydroxide (Zn₂(AsO₄)(OH))
Ojuela Mine (Mapimí, Mexico — world's finest), Tsumeb (Namibia), Lavrion (Greece), Durango (Mexico), Cap Garonne (France)
3.5
The Ojuela Mine in Mexico's Mapimí district produces adamite specimens so exceptional that they've become iconic in mineral collecting — some luminous yellow-green clusters sell for tens of thousands of dollars.
Test Your Knowledge
Why are specimens from Mexico's Ojuela Mine considered the world standard for adamite?
Photo Attribution
Related Specimens
Want to identify rocks yourself?