A lot of coins which have been set in jewelry (particularly reasonably common coins) lose their numismatic value if there are contact marks or other disfigurements caused by their mounting. It may not be so in this case however if it was very carefully done - but gold is soft so it usually is detrimental.
My
Papal States coin collection: https://diadumenian.com/Papal%20Sta...0States.html
Medieval coins collection: https://diadumenian.com/Congressofp...0Europe.html
Indian Rupee Collection: https://diadumenian.com/Congressofp...0Rupees.html
Minor world Silver: https://diadumenian.com/Congressofp...20coins.html
Papal States coin collection: https://diadumenian.com/Papal%20Sta...0States.html
Medieval coins collection: https://diadumenian.com/Congressofp...0Europe.html
Indian Rupee Collection: https://diadumenian.com/Congressofp...0Rupees.html
Minor world Silver: https://diadumenian.com/Congressofp...20coins.html



















