Composition: Calcium carbonate
Nomenclature: Named after a famous occurrence in Aragon Province, Spain.
Industrial Uses: Cement.
Additional Notes: Identical to calcite in chemical composition; however, the crystal structure (the way the atoms are grouped) is significantly different between calcite and aragonite.
Austria : Scott 1274 : 3.50 schilling : 11 May 1984
China (ROC) : Scott 3121 : $5 : 8 May 1997
French Southern and Antarctic Territories : Scott 156 : 5.10 francs : 1 Jan 1990