2.25 carat 14k white gold vintage halo style channel set round brilliant diamond engagement ring milgrain with a 1.5 carat moissanite center houston diamond district 2.25 carat 14k white gold vintage halo style channel set round brilliant diamond engagement ring milgrain with a 1.5 carat moissanite center. side diamonds on engagement rings are g-h color si1-si2 clarity.