Vintage Colorful Natural Opal Gemstone Gold Over Sterling Silver Ring Size 6.5

Vintage Colorful Natural Opal Gemstone Gold Over Sterling Silver Ring. Size 61/2. The metal shows light signs of wear and it has not been cleaned. The inside of the ring shows some blackened marks (see picture 4). I did not see any damage or issues with the opals. STUNNING ring. Please use the pictures as your main source of reference, but feel free to message me with any questions at all. Thanks for looking!