A Geoscience Digital Image Library

DescriptionChromite is a dark brown to black mineral. It is an iron-chromium oxide, FeCr2O4, with traces of magnesium and aluminum. Its crystals are octahedral, but rare. It usually occurs as irregular, granular masses in association with igneous rocks, including ophiolites, which are segments of oceanic crust exposed on land by tectonic processes usually associated with plate convergence. The only commercial source of chromium and its compounds, chromite is used in the manufacture of refractory materials.
LocationUSA ▹ Pennsylvania ▹ Delaware
PhotographerDarla Sondrol. 2001-07-31.
CollectionUniversity of North Dakota Mineralogy Collection #453.
Key wordsChromite, Pennsylvania
Tech details801 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens.
GeoDIL number1396