This is a stunning natural diamond engagement ring set. The rings are unmarked but have been tested and are made out of 14k solid gold. They are between a ring size 4.5 and 4.75. They weigh together a total of 2.40 grams. The biggest diamond measures slightly over 3mm across. The three smaller diamonds measure approximately 2mm across. I do not know the total carat weight of the diamonds. The natural diamonds have great clarity and really spark...le in the light. I've examined the ring under a microscope and there are no chips in any of the diamonds. The rings are light weight and very comfortable to wear. They look gorgeous when worn. Thank you for looking!