Miabella 925 Sterling Silver 15.00 ct Genuine Smoky Quartz Solitaire Gemstone Ring for Women, Rectangular Cushion Cut 24x12 925 sterling silver with a plating of pure rhodium for added brilliance and durability 15.00 ct natural faceted rectangular cushion cut smoky quartz 24x12mm High polished ring with unique double prongs holding the center stone Nickel-free, hypoallergenic