Magical Item, Component -- Uncommon
This small, naturally faceted gem is full of swirling colors. They occur naturally, but very randomly, and are used explicitly to cast gemjump. Outside of this, the gems have no known value, and although beautiful, are not commonly used as decoration or sold.
School conjuration; Level bard 8, sorcerer/wizard 6
Components V, S, M (roguestone)
This spell is used as an anchor, and at any time after it is cast, the caster may teleport instantaneously to the current location of the gem upon which the spell was cast. This spell is usable no matter the distance between the gem and the caster, even through the separation of planes. As it is an act of will, physical and magical bonds also do not prevent the teleportation. The gem is not consumed upon completion of the spell, and can be used as an anchoring point repeatedly, provided the spell has been recast after it's charge has been used up.
If the gem is stored in an area of space that is too small for the caster to occupy, they will appear in the closest occupiable space - they cannot accidentally appear within walls. Any teleportation done in this manner cannot be reversed, meaning one cannot jump from the location of the gem back to the place where they started.
Gemjump cannot be used if the caster is under the effects of confusion, feeblemind, or fear spells, or any other condition (such as insanity or sleep) during which they are not completely in control of their mental state. This spell cannot be removed by magic unless it's current charge is used, or the roguestone is destroyed.
[Original Source: Dragon Magazine #116, "Rogue Stones and Gemjumping: Another of Elminster's little secrets" by Ed Greenwood, Published by TSR, December 1986]
