" ÆTHIOPS-MINERAL  (Æ'THIOPS-MINERAL)   n.s. A medicine so called, from its dark colour, prepared of quicksilver and sulphur, ground together in a marble mortar to a black powder. Such as have used it most, think its virtues not very great.Quincy. "

― Samuel Johnson , A Dictionary of the English Language (Complete and Unabridged in Two Volumes), Volume One