Bible Dictionaries
Marcasite

Webster's Dictionary

(n.) A sulphide of iron resembling pyrite or common iron pyrites in composition, but differing in form; white iron pyrites.

Bibliography Information
Webster, Noah. Entry for 'Marcasite'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​m/marcasite.html. 1828.