I found this stone whilst on safari in Nairobi. Can anyone help me identify it please?

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closed as unclear what you're asking by Jan Doggen, Pont, Fred, daniel.neumann, JeopardyTempest Mar 17 '18 at 9:16

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

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    $\begingroup$ Welcome to earthscience.SE. Please read this guide to asking rock identification questions and update your question with more information. $\endgroup$ – bon Mar 15 '18 at 22:08
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    $\begingroup$ to take better pictures,take the picture outside on a cloudy day or take the picture in the shade on a sunny day and remember to put some thing of known scale beside the rock. $\endgroup$ – trond hansen Mar 16 '18 at 7:50
  • $\begingroup$ @bon do you think we should make a separate tab for all these 'rock-identification' questions at some point? $\endgroup$ – Eevee Mar 16 '18 at 13:35