Ladies 14k White Gold Ring featuring a Semi-Crystal Solid Opal surrounded by Diamonds is from the 1970's. The oval shape solid opal from Australia measures 18.2 x 13.5mm and weighs approximately 6-8 carats. This semi-crystal opal is multi colored green with hints of light blue and flashes of yellow and pink-orange. It grades a 4-4.5 fire on a scale of 5. Surrounding the solid opal are 28 round, brilliant cut diamonds weighing approximately .55-.60 carats total. The 14k white gold mounting has a intricate undercarriage. The complete ring weighs 6.9 grams and is currently a size 6 1/4 but can be resized, (please inquire about resizing).