Victorian Black Opal Ring w/ Diamonds in 18kVictorian Black Opal W Diamond Ring in 18k. This Victorian right hand ring features a . 44 carat creamy natural opal and . 12 carats of accent diamonds set in 18 karat yellow gold. The scrolling metal work on the sides of the ring evokes a regal feeling that this ring would be at home on the hands of royalty. The contrast between the pure opal color and the rich yellow gold adds a new dimension to the fabulous patina so commonly found on Victorian