1974 10¢ Petrified Wood
Issue Date: June 13, 1974
City: Lincoln, Nebraska
Printed By: Bureau of Engraving and Printing
Printing Method: Lithographed, engraved
U.S. #1538 pictures a cross-cutting of petrified wood, which occurs when fossilized trees turn into minerals by a process called “permineralization.”
America’s Mineral Heritage
The 1974 “Mineral Heritage” se-tenant included the first stamps designed in a diamond shape in the U.S. postal history. Issued to commemorate the importance and abundance of mineral resources to the country, the four stamps were attached to also form a diamond-shaped se-tenant sheet. The stamps pictured petrified wood, tourmaline, amethyst, and rhodochrosite.