a name derived from the Greek, and denoting a superior kind of prase. It occurs at Rosemuth in Silesia, and also at New Fane, Vermont, North America. It is of an apple-green colour, more or less intense. It is translucent, with a fine-grained splintery fracture, nearly even, and occurs massive, in contemporaneous veins, traversing rocks of serpentine. Chrysoprase is nearly allied to calcedony; and derives its beautiful colour from an admixture of the oxide of nickel, as ascertained by the analysis of Klapproth.