Gem, Rock, and Mineral Postage Stamps Featuring

Mineral Name: Mordenite

Composition: Calcium sodium potassium aluminosilicate hydrate

Nomenclature: Named after Morden, Nova Scotia, a locality for the mineral.

Industrial Uses: Chemical filters.

Additional Notes: A member of the Zeolite group of minerals.

French Southern and Antarctic Territories : Scott 163 : 5.20 francs : 1 Jan 1991