1974 Our Mineral Heritage Stamps

These would look "cool" mounted in a small picture frame and hanging in your rock room.The 1974 \u201cMineral Heritage\u201d included the first stamps designed in a diamond shape in the U.S. postal history. They were issued to commemorate the importance and abundance of mineral resources in the country, the four stamps were attached to form a diamond-shaped se-tenant sheet. The stamps pictured petrified wood, tourmaline, amethyst, and rhodochrosite