seems too intricate for aluminum to me.time to invest in acid test kit the way your year is going.she's a beauty !!
That's a chunky ring! Nice!
What did your detector say it is? It sometimes gives you a heads up as to what the metal is.
I've found a number of unmarked silver jewelry pieces. And that's where the test kits come in! Use the 18K gold test on it, shows it as silver more clearly. Youtube taught me that!