Pet Rock

Source
The Pet Rock is obtainable via the rogue's pickpocket ability. It can only be found in the pockets of Timbermaw Shamans.

Trivia
Pet Rocks were a 1970s fad conceived in Los Gatos, California by advertising executive Gary Dahl. The first Pet Rocks were ordinary gray stones bought at a builder's supply store and marketed as if they were live pets. The fad lasted about six months, ending with the Christmas season in December 1975.