18ct Sapphire and Diamond Madison Ring Troy O'Brien Fine Jewellery 18ct Sapphire and Diamond Madison Ring Troy O'Brien Fine Jewellery Madison ring Les Georgettes The Madison Avenue Ring With Clarity The Madison Avenue Ring With Clarity Madison ring 1.8 carat asscher cut ZAYA moissanite Etsy. The Madison Ring features a layered design that adds texture and shine to your look. Its smooth, polished finish makes it suitable for everyday wear or special occasions. Lightweight and comfortable, this ring is a stylish update to your jewelry collection.