5-Stone Ethiopian Opal Ring. Size 8 Stauer The 5-Stone Ethiopian Opal Ring features opal gemstones from Ethiopia, home to some of the world’s finest opals Adding an extra dash of sparkle are rounds of the Ultimate Diamond Alternative®, DiamondAura® Set in .925 sterling silver covered in gold, this ring delivers luxury, romance and elegance. Details 1 9/10 Carats Total Weight (5)4x5mm Oval Cut Genuine Opals Stones, 1/3ctw Each The Ultimate Diamond Alternative™, Diamondaura®: (22)1.2mm Round White Accents Gold-finished .925 Sterling Silver