The Melano VI Bulb Vivid Collection Ring Tops have a nice rounded square shape. The bulb sticks out above the cup so you can see the colour of the stone from every angle. This stunner comes in a range of brilliant colours.  The stone has a diameter of 12mm and is available in stainless, rose gold, or gold plating. You can use these tops in any Vivid Collection Ring Base, simply twist them in!