2 Carat Diamond Halo Engagement Ring Old European Cut2 Carat Diamond Halo Engagement Ring Old European Cut. This modern engagement ring was created from vintage reclaimed materials. The center diamond is a glittering 2. 01 carat old European cut diamond that is bezel set. The center diamond is accented by a halo of of smaller old European and mine cut diamonds that add another layer of sparkle and gorgeous texture. A sight bit of negative space on top and lovely filigree detailing on the bottom allow