Name of a German physician of 17th c.; whence Purple of Cassius, a splendid purple pigment: see quot.
c. 1865. J. Wylde, in Circ. Sc., I. 373/2. The purple powder, produced by precipitating a solution of chloride of gold by means of the chloride of tin, is employed for the purpose of colouring China ware. It is termed in the arts, the ‘purple powder of Cassius.’
1869. Roscoe, Elem. Chem., 252. A splendid purple colour called purple of cassius.
