...and that's exactly how I ended up with a pile of gravel that used to be a trilobite. My uncle told me the same thing about vinegar, swore by it for years. I tried it on a piece of limestone with some small brachiopods and it came out great, like the rock just melted away. Then I got cocky and tried it on a darker calcite chunk and it just crumbled into a sandy mess. Lesson learned: know your mineral better than I know myself apparently.

Nashville is strict about that stuff, and a hidden box is a fire hazard waiting to happen. I'd rather lose a customer than my license over something that simple.

You used to say later was fine, but this makes more sense actually.