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Tags: Colombia, Cundinamarca, Gachalá, iron cross, pyrite, pyrite crystal, pyrite fine mineral, Pyrite Iron-Cross Twin, pyrite specimen, pyrite twin, pyrite twinned crystal, Ray McDougall, Raymond McDougall, twinned pyrite

Tags: Dos de Mayo province, Huallanca District, Huamachuco, Huanuco Dept., Huanzala mine, La Libertad Dept., mine, Mundo Nuevo Mine, Peru, pyrite, pyrite crystal, pyrite fine mineral, pyrite specimen, Ray McDougall, Raymond McDougall, Sanchez Carrion Province, tennantite, tennantite crystal, tennantite fine mineral, tennantite specimen