Victorian Opal Earrings 2 Carats in 18k Yellow Gold.  These Victorian earrings are composed of 18k yellow gold and secure two (2)  gorgeous cabochon cut opals with ornamental prongs adding to the wonderfully vintage look. Each opal is deep and mesmerizing, with cool tones that are contrasted beautifully by the warm yellow gold. The total carat weight for the pair is 2.00 and the diameter of each is 9.56mm.