The Art Deco ring does not have a metal mark but was tested with acid and a " kee" tester to be solid platinum. It weighs 6.9 grams. The round top measures 7/8" in diameter. Bezel set in the center is a round European cut natural diamond with an approx weight of .33 cts. Set around the center diamond are six marquise shape natural coral. Set throughout the remainder of the top are 69 round single cut natural diamonds with an approx total weight of 1.00 cts. Set around the edges are 6 triangle black natural onyx. The inside of the ring has a sizing ring and it wears to a size 6.75. You can have your local jeweler remove the sizing ring and resize the ring . The piece is in nice condition.