CHAP. 22.—SANDARACH.
According to Juba, sandarach and ochra are both of them
productions of the island of Topazus,[1] in the Red Sea; but
neither of them are imported to us from that place. The
mode of preparing sandarach we have described[2] already:
there is a spurious kind also, prepared by calcining ceruse in
the furnace. This substance, to be good, ought to be of a
flame colour; the price of it is five asses per pound.
1. See B. vi. c. 34, and B. xxxvii. c. 32.
2. In B. xxxiv. c. 55. "Pliny speaks of different shades of sandaraca,
the pale, or massicot, (yellow oxide of lead), and a mixture of the pale
with minium. It also signified Realgar, or red sulphuret of arsenic."
—Wornum, in Smith's Diet. Antiq. Art. Colores.