If you are planning to choose a white precious metal, then a colorless or near colorless diamond grade is recommended. The slight yellow tint in a K or L color graded diamond can be perfectly balanced by yellow gold ring band. So, go for gold metal when choosing such a diamond. Besides, set your three-carat diamond in a diamond halo, so that it adds more sparkle to the ring while emphasizing the solitaire’s size and quality. Another way to get a three-carat diamond ring is to split the number of carats or choose a three stone ring with one apiece one-carat diamond. A 3 carat 3 stone diamond ring provides you with a different diamond shape to a round brilliant cut. The princess cut diamond provides a popular option when it comes to three gemstone rings. After round brilliant, it is the second most popular diamond cut originated in the 1960s. It is worth considering if you want something unique other than a round brilliant diamond for your three-carat diamond engagement ring.