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I found this rock and I want to know what it is. It looks like green-grey and when I put one side of the rock on the sun, it changes its colors on that side. Thanksenter image description here

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closed as off-topic by Jan Doggen, uhoh, Fred, Semidiurnal Simon, BillDOe Aug 27 at 21:17

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "Questions about rock identification requests are off-topic. For more information, see the announcement on meta." – Jan Doggen, uhoh, Fred, Semidiurnal Simon, BillDOe
If this question can be reworded to fit the rules in the help center, please edit the question.

  • $\begingroup$ The location of where rocks were found may help those who could answer such questions. $\endgroup$ – Fred Nov 7 '18 at 2:11
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That’s labradorite, it’s a silicate and a type of plagioclase feldspar named after Labrador, Canada. The iridescent colours that are seen is called the “schiller” effect. It is caused by light being scattered by thin layers of feldspar within the rock that formed as it cooled.

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