Revision as of 13:18, 27 April 2013 by (talk)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search


A transparent green iron silicate mineral that occurs naturally as an iron-rich variety of olivine. Fayalite was named after Fayal, an island in the Azores. The brittle green stone is also produced synthetically as a common component in slag stringers from ancient iron working furnaces.

Synonyms and Related Terms

olivine; faialite (Port.); Fayalit (Deut.); fayaliet (Ned.)

Other Properties

Crystal system= orthorhombic Color= green to pale yellow Fracture = conchoidal to uneven. Luster = vitreous. Streak = colorless.

Composition Fe2SiO4
Mohs Hardness 6.5 - 7.0
Density 4.4
Refractive Index 1.83; 1.87; 1.88

Additional Information

Mineralogy Database: Fayalite


  • David C. Scott, David C. Scott, Metallography and Microstructure of Ancient and Historic Metals, The Getty Conservation Institute, Los Angeles, 1991
  • C.W.Chesterman, K.E.Lowe, C.W.Chesterman, K.E.Lowe, Audubon Society Field Guide to North American Rocks and Minerals, Alfred A. Knopf, New York, 1979
  • Thomas Gregory, Thomas Gregory, The Condensed Chemical Dictionary, Reinhold Publishing, New York, 3rd ed., 1942

Retrieved from "http://cameo.mfa.org/index.php?title=Fayalite&oldid=14641"