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Adamsfield is a locality in Tasmania Australia where osmiridium was discovered in 1925. Alluvial mining resulted in one of the world's largest sources of osmium and iridium metal.
Map of Adamsfield, TAS 7139, Australia
Florentine Post Office opened on 1 November 1925. It was renamed Adamsfield next month and closed in 1960.
References
Adamsfield, Tasmania Wikipedia(Text) CC BY-SA