A Geoscience Digital Image Library

TitleTroostite (willemite), calcite and franklinite from Franklin, New Jersey
DescriptionThe pinkish mineral is troostite, a manganese rich variety of willemite, ZnSi2O4. The white mineral is calcite, CaCO3. The black mineral is franklinite, a spinel mineral having general formula ZnFe2O4. This sample, from the world famous mineral collecting locality in Franklin, New Jersey, is 9 cm across.
LocationUSA ▹ New Jersey. Near Franklin.
PhotographerShannon Heinle. 2001-03-21.
CollectionUniversity of North Dakota Mineralogy Collection #1135.
Key wordstroostite, willemite, calcite, franklinite, Franklin, New Jersey
Tech details637 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens.
GeoDIL number226