Chrysoprase is the local godfather (or "Ton") of the Breccia Troll organised crime family and owns the Troll hotel known as the Gritz and the Cavern nightclub. He takes his name from an apple-green variety of chalcedony containing nickel, used as a gemstone, an appropriate name for such a polished smooth talking, suit wearing Troll who is obviously more at home in Ankh-Morpork than most Trolls. His understanding of civilised behaviour is that violence is barbaric, but paying other people to do it is business. He also wears diamond jewellery, apparently made from the teeth of Trolls who moved against him (an allusion to Meyer Wolfsheim in The Great Gatsby, who wears "ivory" cufflinks made from human molars). He considers himself a fine example of a Troll achieving great success in a foreign culture and is the head of the Silicon Anti-Defamation League, which seeks to raise the issue of discrimination against Trolls by humans and Dwarfs in Ankh-Morpork. He is first mentioned in Wyrd Sisters (as "Chrystoprase"), and appears in Soul Music and Thud!. The Light Fantastic briefly features a troll called Krysoprase, who was confirmed to be the same character in The Discworld Companion (it was attributed to the fact that trolls are terrible spellers).