Vtg Miniature Painting of a Mill Mountains inside Fossilized Oyster Shell Signed

Vintage painting of an old mill against the Rocky mountains. Very detailed, hand painted inside a fossilized oyster shell. Measures approximately 7 in in length and 5 in tall. Signed on the back of the shell Daphne Snyder 1984. Please review all the photos for further details. These photos are also a part of description.