Square Cut Emerald & Diamond Engagement Ring in PlatinumSquare Cut Emerald Diamond Engagement Ring in Platinum. This modern engagement ring features a . 95 carat square cut Colombian emerald with . 68 carats of accent diamonds and is finished in platinum. The square cut emerald is bezel set with milgrain detail and a fantastic diamond halo that wraps around sharing light with the primary stone. This would make a special engagement ring for someone looking for something different with their center stone but