This ring is 9k yellow gold, of cast manufacture and hand finished. It features one rectangular cushion shaped solid opal cabochon in an eight double-prong setting.
Currently a size 5 and weighing 2.9g. Ring is sizeable by a knowledgeable jeweler.
The opal is lovely, although not as fiery as some. There is a black resin or similar substance filling in the back of the ring behind the opal to help bring out any fire. This is not easily removable but doesn't seem to impact the wear of the ring. Opal measures 12.24 x 10.30 x 2.20mm with an estimated weight of 1.73 carats.
There is a chip to the edge of the opal, which is difficult to see and even harder to photograph. In the 8th photo, the finger nail identifies the chip on the edge of the stone.