Black Opal and Diamond Platinum Ring. This ring consists of one elongated oval cabochon opal weighing approximately 2.50 carats. This opal possess a very fine play-of-color exhibiting all colors including strong flashes of red and orange and does not exhibit any crazing. This opal is set in four prongs in this platinum setting containing eight round diamonds and two baguette cut diamonds having a total weight of approximately 0.40 carats and a color and clarity rated as GH-VS. This ring weighs approximately 5.9 grams.