Peridot Isle is located in the Steaming Sea to the northwest of Varisia and the east of the Ironbound Archipelago of the Lands of the Linnorm Kings. It is mountainous, and contains one of the most well known Thassilonian ruins, Crystilan.
- ↑ Rob Lazzaretti. (2011). Inner Sea Poster Map Folio, p. 1. Paizo Publishing, LLC.