The colors of rubies and emeralds are so striking that they define shades of red and green—ruby red and emerald green. But ...

CHROMIUM oxide is used extensively as a catalyst, both as the pure oxide and as an essential component of various multicomponent systems. The unsupported chromium oxide gel usually undergoes a ...

dark red chromium(VI) oxide, orange-red lead chromate, bright yellow sodium chromate, brilliant chrome green (that's chrome(III) oxide), light blue chromium(II) chloride, and violet anhydrous chromium ...