Orium is a crystal that glows a bright green glow. It is mined mainly on Labion.
He found a piece during Space Quest II, which he used to see in the dark. He still had it at the end of SQ2, and it was the only piece of inventory that survived his journey in the escape pod. By the time of Space Quest III, the Orium has long since lost its glow. However, Roger sold it to Fester. There is much heated debate about how much he sold it for, however a popular theory is 425 Buckazoids.