This First Day Cover features the 1974 U.S. Mineral Heritage issue: a se-tenant block of four 10-cent stamps depicting petrified wood, amethyst, tourmaline, and rhodochrosite. It is postmarked Lincoln, Nebraska on June 13, 1974, with the official first-day cancel.
The Mineral Heritage series highlighted key American mineral resources that shaped industry, science, and natural history during the 1970s environmental and geological awareness era.
The left-side cachet shows a stylized globe surrounded by envelopes beneath the words “FIRST DAY COVER,” a classic design element from the era’s cachet makers.
This cover is in excellent condition with sharp postmarks and bright, well-centered stamps, making it an attractive addition for collectors of minerals, geology, or U.S. commemorative First Day Covers.
