I'm starting up a Mr. Aqua 12G Long (freshwater, cherry shrimp-centric) with fine-grade Eco-Complete and have started looking around my local area for rocks (momentarily suppressing my online-buying habits).
As I begin down this path I'm curious if anyone might be familiar with this type of rock shown below, and what I might opt to carry around with me other than vinegar to test rocks that I have interest in before purchasing them (or dragging them back home).
I have found all my rocks on a hillside near my house, it's at the edge of a residential area, and found a few piles of non local looking rocks I suppose dumped from torn out landscaping projects. I tested everything with muriatic acid from the hardware store. I use chemical gloves and should probably also wear eye protection.
Last edited by thesawguy; 07-11-2013 at 10:07 PM.
IIRC copper will be greenish blue if its present. That would likely be iron if anything. It shouldn't be hard to google the local mineralogy composition and see if there's anything potentially harmful.