1979: Wieliczka ancient rock-salt mines. A set of two stamps, one depicting the mineral halite (below), and the other a mining scene.
Mineral Stamps from Poland
Denomination/Country/Mint etc
Brass (1)
Bronze (2)
Coins and Tokens (78)
Copper (10)
Counterfeit (4)
England (Pre 1707) (9)
Farthing (3)
Fifty Cents (1)
Five Cent (7)
Gaming Token (2)
Gold (1)
Great Britain (1707 onwards) (26)
Halfcrown (2)
Halfpenny (5)
Hammered (10)
Heaton Mint (29)
Japan (1)
Kings Norton Mint (1)
London Mint (1)
Minium (1)
One Cent (3)
One Dollar (1)
One Double (1)
One Millieme (1)
Penny (38)
Proof (4)
Quarter Anna (1)
Replica (4)
Silver (11)
Stamps (69)
Stamps - Fossils (1)
Stamps - Gems (11)
Stamps - Geology (5)
Stamps - Minerals (55)
Stamps - Mining (12)
Stamps - Waterfalls (2)
Ten Cent (2)
Ten Sen (1)
Token (10)
Twenty Sen (1)
Two Cent (1)
Twopence (2)
Unit (1)
White Metal (3)
York Mint (1)