marcasite

Noun

mar=ca=site

CIDE DICTIONARY

marcasite, n. [F. marcassite; cf. It. marcassita, Sp. marquesita, Pg. marquezita; all fr. Ar. marqashītha.].

A sulphide of iron resembling pyrite or common iron pyrites in composition, but differing in form; white iron pyrites. [1913 Webster]

Golden marcasite, tin. [Obs.]

marcasite, n.
1 a yellowish crystalline iron sulphide mineral.
2 these bronze-yellow crystals used in jewellery.

Etymology

ME f. med.L marcasita, f. Arab. markasita f. Pers.

For further exploring for "marcasite" in Webster Dictionary Online

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