gold, where do you find it?i found it in northern ontario

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while out on a canoe trip i noticed a shimmer of gold reflecting back at me. of course i didn't realise it was gold until i climbed the rock on which it stood. a sliver of gold 1/2 inch wide and 10 or so inches long. i grabbed my pocket knife and dug out a piece about the size of my thumb. i figured iron pyrite, fools gold, but after testing showed to be true gold 10 carat, i have never been able to go back and get more and i'm sure it's still there. i saw it by luck while rounding an island in northern ontario in a canoe. have you ever found valuable gems or such, by luck