A Dragon Stone is an ancient magical stone akin to a sound stone which were used by the Divines to maintain frequent communication. Axan is seen using hers in mid-Eljunbyro to contact Sturke. Luna describes them briefly in Ynanhluutr.
Its appearance is like black charcoal with a crystal sheen. Strange orange flames can be seen inside as it is turned to different angles. The meaning of these points of orange is still unknown. It can alter its size to accommodate its user.