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Arsenic sulphide, a mineral of a brilliant red color; red orpiment. It is also an artificial product.

ut usually combined with silver, cobalt, nickel, iron, antimony, or sulphur. Orpiment and realgar are two of its sulphur compounds, the first of which is the true arsenticum of the ancients. The element and its compounds are active poisons. Specific gravity from 5.7 to 5.9. Atomic weight. Symbol As.…

y when on the war path. -- Indian fire, a pyrotechnic composition of sulphur, niter, and realgar, burning with a brilliant white light. -- Indian grass (Bot.), a coarse, high grass (Chrysopogon nutans), common in the southern portions of the United States; wood grass. Gray. -- Indian hemp. (Bot.) (a) A plant of the…

processes, as indigo printing. Our orpiment and sublimed mercurie. Chaucer. Red orpiment, realgar; the red sulphide of arsenic. -- Yellow orpiment, king's yellow.

Realgar. [Obs.] Chaucer.

realgar. [Obs.] chaucer.

Realgar; red sulphide of arsenic. [Archaic]

Native sulphide of arsenic, including sandarach, or realgar, and orpiment.