moissanite channel set cathedral engagement rings crafted from solid 925 sterling silver, featuring a 3.2mm shank width, weighing 3.6 grams, with robust 18K white gold plating that's 20 times thicker than standard, tarnish resistant, hypoallergenic, nickel-free Moissanite Ring: Featuring 6.5mm, 1 carat GRA certified D color, VVS1 clarity moissanite for center and side stones