A Geoscience Digital Image Library

DescriptionAnorthite is an end member and one of the rarer members of the plagioclase series. The chemical formula for anorthite is CaAl2Si2O8. The name comes from the Greek, an + orthos, meaning “not upright” in allusion to the oblique crystals.
LocationJapan ▹ Hokkaido ▹ Otaro. Near Fuggoppe.
PhotographerShannon Heinle. 2002-09-13.
CollectionUniversity of North Dakota Mineralogy Collection #3074.
Key wordsanorthite, feldspar, plagioclase series
Tech details180 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens.
GeoDIL number2922