Even enlarging the pic, no way to tell. Go back there to take samples to show a knowledgeable person who lives in your area -- that's the way to find out! If you don't recall where you took this accidental pic, then you can wonder all your life whether you missed the big one! Have fun whatever you do. Andi
Crush it up, pan it, and let us know, can't tell from a photo. Does it shine from only one angle (not gold), or does look just as bright from all angles (maybe gold)?