A Geoscience Digital Image Library

TitleMarmatite (sphalerite), Joplin, Missouri
DescriptionSphalerite, also known as blende or zinc blende, has composition ZnS (zinc sulfide). It can occur in many hues. This specimen contains a dark brown iron-rich variety sometimes called marmatite. Although end member sphalerite has composition ZnS, natural sphalerites always contain some iron. As iron content increases the color becomes darker. Sphalerite is the principle ore mineral for zinc.
LocationUSA ▹ Missouri ▹ Jasper County. Near Joplin.
PhotographerDarla Sondrol. 2001-07-10.
CollectionUniversity of North Dakota Mineralogy Collection #184.
Key wordsmarmatite, sphalerite, Missouri
Tech details976 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens.
GeoDIL number1095