1974 10¢ Amethyst
Issue Date: June 13, 1974
City: Lincoln, Nebraska
Printed By: Bureau of Engraving and Printing
Printing Method: Lithographed, engraved
This stamp pictures an amethyst, which is a type of quartz that typically appears violet due to exposure to natural low amounts of radiation. If also exposed to heat, they can be colored yellow or bright green.
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.