A Geoscience Digital Image Library

TitlePeridot (variety of olivine), San Carlos, Arizona
DescriptionPeridot (pronounced pair-a-doe) is the gem variety of olivine. Olivine, is a general name used for minerals of the fayalite (Fe2SiO4) - forsterite (Mg2SiO4) series, so olivine's formula is written as (Mg,Fe)2SiO4. Peridot is usually closer to forsterite than fayalite in composition although iron is the coloring agent for peridot. The best colored peridot has an iron percentage of less than 15% and includes nickel and chromium as trace elements that may also contribute to the best peridot color. The largest crystal shown is about 1.5 cm across.
LocationUSA ▹ Arizona ▹ Maricopa. Near San Carlos.
PhotographerDarla Sondrol. 2001-07-03.
CollectionUniversity of North Dakota Mineralogy Collection.
Key wordsperidot, olivine, Arizona
Tech details225 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens.
GeoDIL number1027