Im pretty serious and I do have reference material. Books, mindat, the entire internet really...all readily available. However, to ask the particular question about if and how acid could affect a certain mineral, seemed like other people, like yourself, would be the better resource.
I do apologise for not including the location, I forget that other people don't know that I only have time to collect locally in PA. This came from PA. Previous posts have mentioned when I have something of unknown origin, things I have bought at auction. I don't like to influence other's opinions, I've seen too many people jump on ID bandwagons in other formus. But I agree that my posts can be too vague. Forgive me?
I will check to see if there is a location specific handbook, great idea