Webster 1913 Edition
a dark violet substance,–
(SO4)3Cr2.K2SO4.24H2O, analogous to, and crystallizing like, common alum. It is regarded as a double sulphate of chromium and potassium.
The green oxide of chromium,
Cr2O3, used in enamel painting, and glass staining.
A pigment made by mixing chrome yellow with Prussian blue.–
a beautiful red pigment originally prepared from the basic chromate of lead, but now made from red oxide of lead.–
a brilliant yellow pigment,
PbCrO4, used by painters.
Webster 1828 Edition
The oxyd of Chrome is of a bright grass green or pale yellow color.