Using Nitric Acid to Determine Metal Help?!?

So I got a new batch of rings
(I know, I just stopped pricing down the last lot). None the less I used 10K nitric acid solution on a old school class ring. It turned blood red with marginal white whispy smoke
. There are no markings of merit, anyone know what kind of metals will yeild these results?
Thanks so much.


Thanks so much.