This custom job was to make a match for an engagement ring the customer already had. She was getting married and needed the ring. Apparently the original artist was no longer available.
You might notice a slight green color to the diamond. That is due to diamond florescence. This happens when the diamond is exposed to sunlight. Not all diamonds have this characteristic. And some have it more than others. Diamond appraisals will always indicate if it fluoresces or not. Some people like this and others not so much.