Rogue stone

A rogue stone (sometimes written roguestone) was a small magical gemstone whose rainbow colors flowed as if in liquid, slowly swirling iridescently, when exposed to sunlight. They were extremely rare and seemed to repel each other&mdash;no two rogue stones where ever found in the same place at the same time. Rogue stones were used to cast the gemjump spell. Rogue stones did not have a detectable magic aura except at the time gemjump spell was being cast, and they were not destroyed or consumed by the initial enchantment or the activation of the spell. A typical specimen had a base value of 5,000 gp