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My grandfather found this thing. enter image description here

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    $\begingroup$ Welcome to Earth Science StackExchange! Please follow the directions in: meta.earthscience.stackexchange.com/questions/124/… to improve the quality of your question and also improve the chances of it getting answered. $\endgroup$ – arkaia Feb 21 '16 at 5:52
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    $\begingroup$ Voting to close for now, but will gladly vote to re-open if the requested details are added. $\endgroup$ – Semidiurnal Simon Feb 21 '16 at 7:41
  • $\begingroup$ Might be an eclogite (red being garnet and green being omphacite) $\endgroup$ – Gimelist Feb 21 '16 at 21:43
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The green material indicates the potential presence of copper & the shiny bits on the lower left & mid right of the specimen look metallic, but that could be just glint in the picture.

Also, there are two groves on the lower right which may indicate a soft metal like copper.

If it is metallic it could be native copper or it could be lump of copper from a foundry.

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  • $\begingroup$ The two indentations on the right were created by a shovel perhaps, So it would have to be a soft metal and when copper ionizes it will look turquoise in color similar to this sample.So I agree with Fred, Copper. But these are only guesses, follow the link Artexabelta posted so a more persice answer will be generated. $\endgroup$ – user5434678 Feb 22 '16 at 17:30

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