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Ajoite is a hydrated sodium potassium copper aluminium silicate hydroxide mineral. Ajoite has the chemical formula (Na,K)Cu7AlSi9O24(OH)6·3(H2O), and minor Mn, Fe and Ca are usually also present in the structure. Ajoite is used as a minor ore of copper.(source: Wikipedia) Preceding public domain photo courtesy of U.S. Geological Society & Wikipedia Commons Preceding photos from eBay auction photos Return to List Back to Michael's Hobbies page Back to Michael Marcotte's HomePage