Victorian Opal and Rose Cut Diamond Ring with Black Enamel

A Victorian Ring, with an Opal, surrounded by 12 Rose Cut Diamonds, set in Black Enamel.  The back of the opal is open and the backs of the diamonds are closed.  The enamel is in good condition, with only a few small chips around the outer edges.  The band of the ring has wonderful detailing on the front and on the sides.  The diamonds range in size from 0.01 to 0.02 carat, and total carat weight is estimated at 0.19 carat (just under 1/5th carat).  The opal dimensions are estimated at 3.64 wide, by 6.17 long, by 2.35 depth, for roughly 0.24 carat.