I have been finding gold flakes in the bottom of my watering barrel. I pull water from the creek via a pump. I have had the acid test done at the jewelers on the gold flakes - no reaction, I have bent the flakes and bent them back the other way - no breakage, I have used a magnet on the flakes - they are not attracted nor repelled, I have done the sandpaper/tile test - gold streaks, not black or green or white. Today I found this rock.... can you help me ID it and the flakes that I am thinking could be gold? Thank you!