.28 Victorian Diamond Cluster Engagement Ring in 18k.  This antique cluster engagement ring features .92 carats of diamonds finished in 18 karat white and 18 karat yellow gold. The center diamond is a .28 carat Old European cut gem. With intricate, glittering facets, the center stone is prong set in white gold. The center diamond is near colorless and haloed by eight (8) .08 carat accent diamonds. The cluster of diamonds at the head of the ring are mounted in an ornate Victorian basket.