Congratulations on the 2 rings.
The AT PRO gave me a 14kt white and yellow gold band at a VDI reading of 65. I would think that the silver ring would ring up in the 80's. Especially on the surface. I would go back and check that spot again.
today i found 15au dollars in change and a indonesian coin aluminium i think and a 1 dollar kiwi coin and a junk ring and nearly a kg in lead sinkers lol , i am at 16 kg now and a hand full of glass broken bottle pieces ;-)) will start posting pics soon