Some of the best diamond for engagement rings are given below. Round Brilliant Diamond This is the classic diamond used in engagement rings. This timeless charm has the maximum capacity to reflect the light and thereby offers an utmost sparkle. Round brilliant cut diamonds are perfect for the brides who are in awe of traditional and elegant fashion. Cushion Cut Diamond Cushion cut diamond rings are one of the beloved options of almost every bride since it was introduced before 200 years. This versatile and prismatic diamond ring is an ideal example of the perfect feminine as well as bold designs. The curved corners and a huge number of facets add to this. Princess Cut Diamond This is the perfect diamond for you if you want to flaunt an ultimate sparkler with a traditional and romantic touch on your big day. This fancy and feminine style diamond enhance its glitter by using a blend of both round brilliant and step cut facets. Furthermore, this is more affordable than round cut diamonds as well.