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Does anybody know what these rocks are?

I found them in the same place in Crete. I don't know much about minerals, but the hardness must be over 6 because I tried to scratch with everything I have at home and it didn't scratch.

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Here is the left one under laser light:

enter image description here

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closed as off-topic by Universal_learner, trond hansen, Gimelist, Peter Jansson, BillDOe Jul 19 at 20:54

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

  • "Please review our rock identification guidelines to provide the missing information so that your question is both answerable and useful to new users." – Universal_learner, trond hansen, Gimelist, Peter Jansson, BillDOe
If this question can be reworded to fit the rules in the help center, please edit the question.

  • $\begingroup$ A guide for asking “Identify this rock” questions $\endgroup$ – Jan Doggen Oct 19 '17 at 7:20
  • $\begingroup$ Where the same place in Crete? City/village, natural surroundings (river, beach,..) $\endgroup$ – Jan Doggen Oct 19 '17 at 18:57
  • $\begingroup$ It's a place that a small river and tha see got mixt together... $\endgroup$ – Ilir Ndoj Oct 19 '17 at 19:12
  • $\begingroup$ The left one is clearly quartz. The right one is also likely to be quartz, just with some impurities that make it green at some spots. $\endgroup$ – Gimelist Nov 1 '17 at 21:30
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Quartz / quartzite pebbles. The green in the right pebble could be chlorite or epidote.

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