Coffee Obsidian, Simulated Ruby Color Diamond Ring in Sterling Silver (Size 10.0) 4.50 ctw. 11x11mm coffee obsidian secured in twin prong setting. Haloed with milgrain, the gemstone is accompanied by ruby CZ set on shoulders. The designer shank and side gallery are beautified with filigree scrolls. • Made in stamped 925 sterling silver,. The metal is durable and hypoallergenic. Comfortable to wear, the ring is precisely crafted with superior finish. Box1/25/27/65/3