The ring is marked PT950 FOR 95% PLATINUM and weighs 5.6 grams. It also has the makers name, " RHAPSODY.  Set at the top is a trillion deep purple natural tanzanite with an approx weight of 2.00 cts. Set on each side of the stone are three round brilliant cut clean natural diamonds. The 6 diamonds have an approx total weight of .12 cts. The ring wears to a size 7 and can be resized.