Mid-Century Diamond Cluster Ring in 14k White GoldMid Century Diamond Cluster Ring in 14k White Gold. This beautiful mid century diamond ring features a . 39 carat round brilliant cut diamond at its center, with lovely open halo set wide around it in 14 karat white gold. The unique look of the ring owes itself to the wonderful open basket that features rows of white gold running out toward the halo. The band is sleek and thin, completing this very special and distinguished piece.