A Geoscience Digital Image Library

TitleBementite with limonite and quartz
DescriptionBementite (H10Mn8Si7O27) crystals are not known, as the mineral is found in massive granular form, breaking into rectangular blocks. It is found in radiate or stellate masses with minute foliate structure, and in compact, hornlike form. This sample is about 6 cm in length and is seen here with limonite and quartz.
LocationUSA ▹ Minnesota. Mesabi Range.
PhotographerNessa Eull. 2002-03-25.
CollectionUniversity of North Dakota Mineralogy Collection #1144.
Key wordsBementite, Limonite, Quartz, Minnesota
Tech details596 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens.
GeoDIL number2539