Portugal
Scott 1107
2.50 escudo
24 Sep 1971
| Mineral Name: | Arsenopyrite |
| Composition: | Iron arsenic sulfide |
| Nomenclature: | Named after the mineral's chemical composition. Pyrite is the mineral name for iron sulfide. With arsenic added to the chemical make-up, the name was extended to arsenopyrite. |
| Industrial Uses: | Iron ore, aresenic ore. |
| Additional Notes: | Also referred to as arsenical pyrite and the older name mispickel; however, arsenopyrite is now the official name for this mineral. |
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Arsenopyrite Portugal Scott 1107 2.50 escudo 24 Sep 1971 |
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| The stamp shows a natural, unpolished mineral specimen. | |
| http://stampmin.home.att.net/arsenopyrite.htm | Philatelic Mineralogy | Copyright © 1997-2008 by Richard Busch |