A carat of diamonds is made up of 100 points of diamonds, and diamonds as small as ½ point (.005ct) are often used in halos surrounding larger centre diamonds, and in the bands of rings.
Most popular centre diamonds may range, on average, between a half a carat (.50ct), to a whole carat (1ct). Some may be used as a solitaire without any smaller diamonds surrounding it, or it may be the centerpiece with surrounding smaller diamonds, either in a halo or three-stone ring. The size of the centre stone or stones used by the client is their own choice and most often will depend on the client’s budget, as the diamond will be the most expensive part of the ring.