1/8 CTW Diamond Halo Engagement Ring Diamond halo engagement ring with double shank in 14K, 18K, or platinum. There are 28 round brilliant cut diamonds set around the center stone. The diamonds are 0.125 carats total weight, SI2 in clarity and H in color. Center stone is sold separately and... MSRP: Was: Now: $1,235.00 - $1,868.75