虹光寶石（Iridescent Gem） is a Don't Starve Together exclusive item, introduced in the A New Reign DLC. It can only be acquired by using a Deconstruction Staff on the Moon Caller's Staff. Currently it has no known uses, as the Moon Caller's Staff cannot be crafted.
- The gem bears a strong resemblance to an opal, having a white hue with a colorful tint. This is also indicated by the gem's spawn code.
- This gem is the only item that can only be obtained by destroying something with a Deconstruction Staff.