Cats too, with what silent stealthiness, with what light steps do they creep up to a bird!
Pliny the ElderThere is in them a softer fire than the ruby, there is the brilliant purple of the amethyst, and the sea green of the emerald - all shining together in incredible union. Some by their splendor rival the colors of the painters, others the flame of burning sulphur or of fire quickened by oil.
Pliny the Elder