This is a wonderful vintage Art Deco citrine ring set in 14K gold that dates to around the 1930s. It is a large oval clear yellow citrine stone of about 6 carats set in a beautiful gold setting which has a warm rose gold color. I can find no fineness mark, I think because it may have been resized at some point. It does test positive for 14K gold.
It is a size 5 1/2 and could be resized by a jeweler, if desired. It is in lovely condition with only some minor age related wear to the shank.