| epidote | <chemical> A mineral, commonly of a yellowish green (pistachio) colour, occurring granular, massive, columnar, and in monoclinic crystals. It is a silicate of alumina, lime, and oxide of iron, or manganese. The Epidote group includes ordinary epidote, zoisite or lime epidote, piedmontite or manganese epidote, allanite or serium epidote. Origin: Gr. To give besides; over + to give: cf. F. Epidote. So named from the enlargement of the base of the primary, in some of the secondary forms. Source: Websters Dictionary (01 Mar 1998) |
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