Gem, Rock, and Mineral Postage Stamps Featuring

Mineral Name: Pyrrhotite

Composition: Iron sulfide

Nomenclature: Named after the Greek word "phrrhotes," meaning "redness," a reference to the mineral's color.

Industrial Uses: Ore of iron and sulfur.

Additional Notes: Pyrrhotite forms both hexagonal and monoclinic crystals depending upon the ratio of iron to sulfur in the specimen. Technically, pyrrhotite should be described as two, separate mineral species--one for each crystal system due to these differences--however this has not been done since the two forms are commonly intermixed in the same specimen. Pyrrhotite is weakly magnetic--a property which is important in distinguishing it from other minerals that have a similar appearance.

Yugoslavia : Scott 1498 : 2.50 dinar : 10 Sep 1980