THIS 18KT YELLOW GOLD OPAL AND DIAMOND RING IS AN ENGINEERING SUCCESS. THE OPAL AND DIAMONDS ON THE TOP CAN BE UNLATCHED AND WORN AS A PENDANT WHEN YOU RELEASE THE LEVER ON THE BAIL (SEE PICTURES). THE OPAL, WITH ITS INCANDESCENT AND EVER-CHANGING COLORS, IS 1 INCH LONG AND 1/2 INCH WIDE. IN 4 SECTIONS AROUND THE OPAL, THERE ARE SPARKLING PRONG-SET MARQUISE AND ROUND DIAMONDS, VS2 CLARITY AND H COLOR, THAT INCREASE THE LENGTH OF THE RING TO 1 1/2 INCH LONG AND 1 INCH WIDE. THIS UNIQUE RING SITS 5/8 INCH HIGH ON THE FINGER.