Sterling Silver, 22K gold, Australian Boulder Opal.  A gorgeous pastel pallet in this opal, set in 22K gold with a rustic hand carved band with little dots of 22k (PLEASE SEE THE VIDEO THAT GIVES A SENSE OF THE SCALE AND COLOR)  The stone is 3/4" x 3/4" and it is size 8-1/2.  It CANNOT be sized.  EXCHANGES ACCEPTED WITHIN 10 DAYS OF RECEIPT.