Opal is a semiprecious iridescent rock, made from hydrated silica.
In the late 9th century, opals could be found throughout England, and the Thousand Eyes merchant guild as well as their leader Reda used them as a form of trade currency or rewards for certain contracts. The Viking shieldmaiden Eivor Varinsdottir of the Raven Clan found many of these during her travels and traded them with Reda for equipment.
Behind the scenes
- Assassin's Creed: Syndicate (first mentioned)
- Assassin's Creed: Valhalla (first appearance)