Page 20 of the AD&D 2e book Running the Realms describes the item found by Shond Tarovin known as the Living Gem:
In Schamedar (Calimshan), the adventurer-wizard Shond Tharovin has announced his discovery (in the ruins found in the Forest of Mir) of a glowing, faceted ruby as large as a human's head. He found the stone floating in midair in a shattered underground temple, and believes it to be the stone known in ancient texts as the Living Gem. It flies about at his command, and Shond Tharovin has taken it to meetings with the local ruling council.
Is this gem the same as the Calimemnon Crystal described in page 13 of the Empires of the Shining Sea book? If not, is this described in any other official source?
P.S.: All the books cited here are from 2e, but I am interested in official description from any edition.