[per-i-doh, -dot] /ˈpɛr ɪˌdoʊ, -ˌdɒt/

noun, Mineralogy.
a green transparent variety of olivine, used as a gem.
a pale green transparent variety of the olivine chrysolite, used as a gemstone

type of gemstone, mid-14c. (mid-13c. in Anglo-Latin), from Old French peritot (early 13c., Modern French péridot), of unknown origin.


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