Sterling Silver, 22K gold.  This sweet little emerald is Lab Created, with identical properties as a real emerald, inclusions and all, except it was mad in a lab...the same way some diamonds are being made today. It is a traditional cut that I flipped over and set with the point up....who needs traditional right??!!  The rustic shank was made by heating the surface of the silver and carving into it with a stylus (PLEASE SEE THE VIDEO THAT GIVES A SENSE OF THE SCALE) Size 7-3/4. I am sorry IT IS NOT sizable.   EXCHANGES ACCEPTED WITHIN 10 DAYS FROM RECEIPT.