Antique VICTORIAN Carved Shell LADY CAMEO Sterling Silver & MARCASITES RING 7!

Beautiful Victorian CARVED SHELL LADY CAMEO& MARCASITES STERLING SILVER RING! If you look close with a loop, you can see the carving knife marks on the shell (see 2nd and 3rd photos). The Ring has a dark patina, which I did not try to polish. The Inside of the Ring has some markings, but I can only see, "Silver". Can't read the rest. The Ring test positive for Sterling Silver with 18kt acid. The Ring is Size 7. PLEASE VIEW ALL THE PHOTOS AND ASK ANY QUESTIONS YOU MAY HAVE BEFORE BUYING