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fayalite
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forsterite-fayalite series
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fayalite

mineral
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Britannica Editors
Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree....
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History

fayalite, iron-rich silicate mineral that is a member of the forsterite–fayalite series (q.v.) of olivines.

This article was most recently revised and updated by John P. Rafferty.