Sorry to hear about the ring. Can’t swear to it but I think that was a Nazi party member ring. Aluminum is what the Germans mostly preferred to use, it doesn’t rust.
If the badges have a rifle in the center that’s called an “Infantry Assault Badge’’, similar to a “Combat Infantry Badge’’ (CIB) in the US Army.
If it depicts a tank that’s a “Panzer Assault Badge’’ it means the wearer survived at least three major armored battles.
The German Army in WW2 was rather sparse when it came to handing out citations, at least in the beginning of the war.
You really had to prove yourself.