arsenic

[Arsenic;] a well-known kind of stone [or mineral, for it is a metal]; of which there are several species; one species is white [i. e. white arsenic]; and another is red [i. e. realgar, or red arsenic, also called sandarac]; and another is yellow [i. e. orpiment, or yellow arsenic]: (K, TA:) it is an arabicized word from the Pers. [زَرْنِيخْ or زَرْنِيقْ or زَرْنِىْ or زَرْنَهْ]. (Msb.)