Cathedral Diamond & Cubic Zirconia Ring in 18k White Gold This ring is crafted in 18k white gold and features prong-set diamonds and cubic zirconia accents in a cathedral design. The diamonds total approximately 3.55 carats. The ring is currently a size 6.5, measures approximately 8mm wide, and weighs 11.92 grams. This ring can be resized for an additional fee. Diamond, the birthstone for April, is associated with clarity, strength, and fidelity.