1998 Minerals of Cyprus. More information and the full set of four stamps here.
Mineral represented: Gypsum. The other three in the set are pyrite, jasper and chalcedony.
Mineral Stamps from Cyprus
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)