<p>I'm Erfan from Yemen, I found this stone in my village's mountain, it looks not normal stone, it's shinning like a crystal and headlight can penetrate it.</p>

<p>There are hundreds of it in the mountain.</p>

<p>Can you tell me please what it's kind, and does it precious stone?</p>

<p>My Regards</p>

<p><img src="https://i.sstatic.net/bCL4h.jpg" alt="enter image description here"></p>

CC BY-SA 4.0
2019-11-27T08:56:07.623Z
Your rocks are probably calcite (calcium carbonate) inside an accretion coating. Calcite is too common to have value, but your rocks are an unusual form and may have a small value as curiosities or geological specimens. To test that it is calcite, put some acid on it. If it is calcite, it should fizz.
Michael Walsby
CC BY-SA 4.0
2019-11-27T09:25:26.960Z
Try vinegar if you don't have access to acid! :-) This should cause a weak fizz reaction.
MiguelH
<geology>
Inquiry, Is this Crystal?
Erfan Al-Naqeeb
# Inquiry, Is this Crystal?

(Asked by: username_0 on 2019-11-27)

I'm username_0 from Yemen, I found this stone in my village's mountain, it looks not normal stone, it's shinning like a crystal and headlight can penetrate it.

There are hundreds of it in the mountain.

Can you tell me please what it's kind, and does it precious stone?

My Regards

![enter image description here](https://i.sstatic.net/bCL4h.jpg)

**Tags:** geology

> **Comments:**
> **username_1**: Your rocks are probably calcite (calcium carbonate) inside an accretion coating. Calcite is too common to have value, but your rocks are an unusual form and may have a small value as curiosities or geological specimens. To test that it is calcite, put some acid on it. If it is calcite, it should fizz.  
> **username_2**: Try vinegar if you don't have access to acid! :-) This should cause a weak fizz reaction.  

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## 0 answers

