A Geoscience Digital Image Library

DescriptionPrehnite, Ca2Al2Si3O10(OH)2 (calcium aluminum silicate hydroxide), is an attractive mineral and is occassionally used for ornamental stone purposes. Typical prehnite forms rather thick crusts with a rough or crystaline texture. The color is usually a pleasant green and is at times distinctive of prehnite. Prehnite can be associated with many nice minerals and can make a fine specimen on its own. This sample is approximately 8 mm in width.
LocationUSA ▹ Michigan. Lake Superior.
PhotographerNessa Eull. 2002-02-15.
CollectionUniversity of North Dakota Mineralogy Collection #1265.
Key wordsPrehnite, Michigan
Tech details1.39 MB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens.
GeoDIL number2373