Floating Three Stone Diamond Engagement Ring - Platinum. A classic three stone ring silhouette is updated by a unique open gallery, allowing maximum light to reach the floating diamond. A hidden halo of diamonds wraps the gallery wire in shining light (1/6 total carat weight). Platinum Lumiere Classic Diamond Engagement Ring, Classic Platinum Three-stone Ring, Elegant Three Stone Lab-grown Diamond Rings, Comfort Fit Brilliant Earth Platinum 3mm, Luxury Three-stone Platinum Jewelry, Open Gallery, Three Stone Diamond Rings Engagement, Three Stone Diamond Ring, Lab Diamond Engagement Ring