The ring is marked 18k and is solid yellow gold. It weighs 8.2 grams. Set in the ring is a beautiful blue faceted oval natural Aquamarine with an approx weight of 5.75 cts. Set on each side of the aqua are three round brilliant cut VS quality natural diamonds. The six diamonds have an approx total weight of .28 cts. The ring wears to a size 8 and can be resized.