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I went hiking and I found this rock with something inside. I would like to know what it is.

Thanks!!!

enter image description here

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closed as off-topic by hichris123 Jul 16 at 23:51

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." – hichris123
If this question can be reworded to fit the rules in the help center, please edit the question.

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    $\begingroup$ Please add the location where you found the rock. Nearby city/town, county, state or province and country. Blue mineral is interesting, might apatite, calcite, fluorite or something more unusual. $\endgroup$ – Gary Kindel Jun 21 '17 at 12:24
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    $\begingroup$ On top of what Gary Kindel says, please follow this guide on how to ask rock ID questions. $\endgroup$ – gerrit Jun 21 '17 at 13:14
  • $\begingroup$ It looks somewhat like flint forming in limestone. $\endgroup$ – blacksmith37 Jun 21 '17 at 20:17
  • $\begingroup$ I'm with @GaryKindel it has a very "fluorite"ish feel to it, but we need more details to answer positively. $\endgroup$ – Gimelist Jun 25 '17 at 10:23
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    $\begingroup$ My first impression was fluorite. It's perhaps the most common blue macrocrystalline mineral. The usual hardness tests would help as well as HCl test, etc. Placing under UV light might shed some .... light (excuse the pun) on the matter. $\endgroup$ – Ton Jun 29 '17 at 10:06