Yes, the diamond from the Sultan Turkey is now set in the front of the band of Queen Elizabeth's Circlet.
My understanding of the will of Queen Victoria is that although they were designated as heirlooms of the Crown, there was no rule stipulating that they couldn't be altered. After all Queen Victoria herself altered many of the jewels that she inherited from Queen Adelaide.
--Previous Message-- : A couple of other questions: : : Is the large Turkish diamond now set in the : Queen Mother's crown along with the other : diamonds from Queen Victoria's circlet? : : Since the Victoria circlet was designated by : Queen Victoria for the use of future queens, : should it have been dismantled to create the : QEQM crown? : :