James St. John:
Old Faithful Geyser 5 cents postage stamp (perforated) (1934)
James St. John:
Old Faithful Geyser 5 cents postage stamp (imperforate) (1935)
James St. John:
French Southern & Antarctic Territory 5.1 francs Zeolite postage stamp (1989)
James St. John:
French Southern & Antarctic Territory 7.30 francs Analcime postage stamp (1989)
James St. John:
French Southern & Antarctic Territory 1.00 franc Quartz postage stamp (1998)
James St. John:
Australian Antarctic Territory 15 cent Prince Charles Mountains postage stamp (1984-1987)
James St. John:
Australian Antarctic Territory 25 cent Sea Ice & Iceberg postage stamp (1984-1987)
James St. John:
Australian Antarctic Territory 30 cent Mt. Coates postage stamp (1984-1987)
James St. John:
Australian Antarctic Territory 33 cent "Iceberg Alley" near Maswon Station in Antarctica postage stamp (1984-1987)
James St. John:
Australian Antarctic Territory 45 cent Brash Ice postage stamp (1984-1987)
James St. John:
Australian Antarctic Territory 90 cent Pancake Ice postage stamp (1984-1987)
James St. John:
Cuba 10 centavos Prehistoric Humans - Australopithecus postage stamp (1997)
James St. John:
Cuba 15 centavos Prehistoric Humans - Java Man postage stamp (1997)
James St. John:
Cuba 15 centavos Prehistoric Humans - Peking Man postage stamp (1997)
James St. John:
Cuba 15 centavos Prehistoric Humans - Neanderthal Man postage stamp (1997)
James St. John:
Cuba 65 centavos Prehistoric Humans - Cro-Magnon Man postage stamp (1997)
James St. John:
Cuba 75 centavos Prehistoric Humans - Oberkassel Man postage stamp (1997)
James St. John:
North Korea 200 won Fossils - Rhinoceros Jaw postage stamp (2007)
James St. John:
North Korea 130 won Fossils - Yoldia Bivalves postage stamp (2007)
James St. John:
North Korea 70 won Fossils - Neuropteridium Fern postage stamp (2007)
James St. John:
North Korea 15 won Fossils - Rugose Corals postage stamp (2007)
James St. John:
10 cent Mineral Heritage block of 4 postage stamps (1974)
James St. John:
10 cent Mineral Heritage "Mail Early in the Day" block of 6 postage stamps (1974)
James St. John:
10 cent Mineral Heritage zip code block of 4 postage stamps (1974)
James St. John:
$3 Mars Rover Sojourner postage stamp on first day cover (1997)
James St. John:
45 cents Earthscapes: Grand Prismatic Spring postage stamp (2012)
James St. John:
47 cents Planet Pluto postage stamp (2016)