A Geoscience Digital Image Library

TitleAndradite from Kern County, California
DescriptionThe red-brown mineral is andradite, Ca3Fe2Si3O12(calcium iron silicate). Like other garnets, perfect andradite crystals have 12 rhombic or 24 trapezoidal faces or combinations of these and some other forms. The crystals seen here are not perfect, although they do show some faces. Andradite is the calcium iron garnet and forms in contact or regional metamorphic rocks. It is closely related to grossular, the calcium aluminum garnet. The white mineral is calcite. This specimen is 11 cm across.
LocationUSA ▹ California ▹ Kern County
PhotographerDarla Sondrol. 2001-07-03.
CollectionUniversity of North Dakota Mineralogy Collection.
Key wordsandradite, garnet, California
Tech details978 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens.
GeoDIL number1022