2016 Minerals. Minisheet. Agency issue.
Minerals represented: Corundum (ruby), copper, epidote, and crocoite.
2023 World-renowned mineral deposits. Lengenbach Mine (Switzerland). Mini sheet. Agency issue. Not in Colnect.
Minerals represented: Lengenbachite, sphalerite, rutile, seligmannite, hatchite, hutchinsonite, goyazite, and jordanite.
Specimens and photos – Stephan Wolfsreid.
