Ring in 18K yellow gold with rock crystal, 8 mm. The Cocktail series is characterized by sparkling stones in large settings and meetings between matte and shiny surfaces. The ring has a soft classic shape and a shiny surface and the elegantly cut stone rests in a large matte setting with shiny tops. The Cocktail rings are available with three different stone sizes. This is the largest. Material: Gold Karat: 18K Stone: Crystal Stone Colour: White Ringband: 2 mm Dimensions: Size of stone: 8 mm Does it come with certificate? No