Bible Dictionaries
Proustite

Webster's Dictionary

(n.) A sulphide of arsenic and silver of a beautiful cochineal-red color, occurring in rhombohedral crystals, and also massive; ruby silver.

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