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A Geoscience Digital Image Library

1045.jpg
TitleMarcasite
DescriptionThis specimen is 14 cm wide and is all marcasite, FeS2 (iron sulfide). The maracasite has a coxcomb habit which is typical. Marcasite is a polymorph (same composition but different atomic arrangement) of pyrite, its more common cousin. The marcasite shown here is tarnished, but when fresh has a bright golden metallic color.
PhotographerDarla Sondrol. 2001-07-09.
CollectionUniversity of North Dakota Mineralogy Collection #439.
Key wordsmarcasite, myrite
Tech details674 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens.
GeoDIL number1045