Posts

Chile, 1996

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Canada, 1996 (100th Anniversary of the Klondike Gold Rush)

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Canada. 1992

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Brasil, 2001

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Brasil, 1998

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Brasil, 1989

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Yugoslavia (Federal Republic of Yugoslavia), 2001

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USSR, 1968 (8th Congress for the Development of Mineral Resources)

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USSR, 1963

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Hungary, 2013 (3D stamps)

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Hungary, 1969

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Switzerland, 2014 (International Year of Crystallography)

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Switzerland, 2003

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Switzerland, 2002

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Switzerland, 1961

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Slovenia, 2007

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Slovenia, 2005

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Slovenia, 2003

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Slovenia, 2001

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Slovenia, 2000

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Slovenia, 1999

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Slovenia, 1997

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Russia, 2000

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