Ruby pendant

Regis' ruby pendant was a ruby pendant of beguiling. Originally owned by Pasha Pook, it was a key to his move to the top of the Calimport criminal world. The gem was stolen by Regis, who left the criminal world for Icewind Dale, where he used the ruby to gain the upper hand in the negotiation in Ten Towns. Artemis Entreri was sent to find the gem and the hin and get them back to Pook.

Additional Sources
Thomas M. Costa (2008) The Lone Drow: Companions of the Hall