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What kind of mineral have I found? (Netherlands, forest)

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hello, I have recently found a chunk of quartz with some kind of green shining metallic looking mineral grown on it. Structure seems like as if it is a little metal brush with thin hairs on it. 

Kind regards, 

asked Feb 27 by Lemurian (340 points)

1 Answer

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This mineral doesn't have any outright identifying pictures that would enable it to be indentified by just visual identification. It does look most like actinolite but there could be many other minerals that resemble it. You would probably need to take it to expert for a more positive identification.
answered Apr 29 by hershel (49,750 points)

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