These items usually resemble lumps of unworked stone. They come in pairs. Once a day, each stone in a pair can send a message (as the sending spell) to the bearer of the other stone. If the stone's mate is not in a creature's possession, no message is sent and the user knows the communication has failed. If either stone in the pair is destroyed, the mate becomes useless.
Caster Level: 7th
Prerequisites: Craft Wondrous Item, sending Market Price: 15,000 gp, (for a pair); Weight: 1 lb.