This vintage Zuni Cobblestone Turquoise Ring is a unique piece of Native American jewelry made with natural blue turquoise painstakingly polished in rectangular shapes. The ring is crafted from cast sterling silver with a 925 metal purity...tested. Handmade in the United States, this ring is a beautiful representation of ethnic and regional style, perfect for unisex adults looking to add a touch of vintage charm to their accessories collection. Looks to be a dark worn maker's signature on the ring.