Stamped 14K WMJ. Size 7 3/4. Weighs 2.8 grams. This is a beautiful blue green Australian opal. There is a slight chip on the opal - not noticeable to the eye. Opal is 5mm x 7mm. The stone could be re-polished. This is an antique piece and obviously much loved. The opal is showing wear, the ring itself is in excellent condition.