Absolutely beautiful Vintage 1980 " Black Hills Gold" overlay of 18kt.gold( 750) over Silver(925)..it has BOTH stamps inside! Yellow Gold overlay for sunflowers, the front & sides you see while wearing are stunning..the back has some typical of wear.Was My Mother's in 1978 or so.So Very Hippie/ Love Child Vintage! The Gold content is not a factor because it's over lay so not enough weight for bothering to melt for scrap..its just a very thin layer & The rest may have a tinge of alloy but not entirely sure as I have not had it tested.It's Well Loved & it has a History and a Gorgeous Patina! As I looked up Comps, I found comparable rings anywhere from 325.00-550.00..My loss is your Gain! My Husband recently passed away unexpectedly and we had no insurance or savings so I'm trying to sell whatever I can to help my Family. Thanks for shopping and looking!