3.65 Carat Moissanite Round Vienna Ring3 5 8ct. tw Moissanite & Diamond Halo Engagement Ring A 3. 1 carat brilliant cut moissanite is centered on this halo diamond engagement ring. The moissanite is a synthetic lab created gemstone while the diamonds are naturally earth mined from conflict free sources. The ring features a split shank band made with 14 karat gold and a highly polished finish. The ever popular halo style is depicted here with a mix of the two stone types and an extra large