Vintage Turkish Chrysoprase factory stone ring, with gold vermeil, marked 924 size 11

factory This a large Men's Chrysoprase ring, where the stone tests as a chrysoprase stone. It as a size of 11. It is marked as silver "925" and it is in great condition. The side of the ring has an Otoman Sultan's signature and on the other side the cresent and tulip. Thanks for looking!