or CAMAYEU, a word used to express a peculiar sort of onyx; also a stone, on which are found various figures, and representations of landscapes, or the like, formed by a kind of luxus naturae, so as to exhibit pictures without painting. It is of these camaiiues Pliny is to be understood as speaking when he says of the manifold pictures of gems, and the particoloured spots of precious stones: *Gemmarum picturae tum multiplex lopidumque tum discolores maculae.*

Camaiieu is also frequently applied to any kind of gem on which figures are engraved either indentedly or in relief. In this sense the lapidaries of Paris are called, in their statutes, cutters of camaiiues.

A society of learned men at Florence undertook to procure all the cameos or camaiiues and intaglios in the great duke's gallery to be engraved; and began to draw the heads of different emperors in cameos.

Camaiieu is also used for a painting, where there is only one colour, and where the lights and shadows are of gold, wrought on a golden or azure ground. When the ground is yellow, the French call it *cirage*; when gray, *grisaille.* This kind of work is chiefly used to represent basso relievos. The Greeks call pieces of such sort *panezostruma.*