A Geoscience Digital Image Library

TitleOligoclase, var. sunstone
DescriptionOligoclase, Na(90-70%)Ca(10-30%)(Al,Si)AlSi2O8 (sodium calcium aluminum silicate), is not a well known mineral, but has been used as a semi-precious stone under the names of sunstone and moonstone. Sunstone has flashes of reddish color caused by inclusions of hematite. Oligoclase is a member of the plagioclase feldspar group.
LocationNorway ▹ Bamble. Near Bjordam.
PhotographerDarla Sondrol. 2002-02-15.
CollectionWard’s Classroom Collection of Gem Minerals #30.
Key wordsoligoclase, sunstone, Norway
Tech details448 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens.
GeoDIL number2381