The Châtelaine® Collection is a perfect fusion of David and Sybil Yurman’s combined art—the marriage of a sculptor and a painter—form and color.   David Yurman ring from the Chatelaine® Collection. Sterling silver as shank, hardware and settings. Amethyst, black onyx, prasiolite or blue topaz. Gemstone in prong settings with diamonds. 0.03 total diamond carat weight. Black Onyx, 1.80 total carat weight Approx. 8mm. Imported. Care Instructions: Use the provided polishing cloth to gently wipe this item clean, then remove any remaining tarnish with mild diluted soap. Rinse with warm water, dry with a clean towel and store it in its jewelry pouch.