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Help identify from tunisia
  
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Marouenca




Joined: 22 Mar 2017
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Location: Tunisia

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PostPosted: Mar 22, 2017 09:03    Post subject: Help identify from tunisia  

Hi, I just found this and I'm new and don't know a lot. So guys can you help me to identify this mineral?


Screenshot_20170321-115503.jpg
 Locality:
Tunisia
 Dimensions: 4
 Description:
 Viewed:  1031 Time(s)

Screenshot_20170321-115503.jpg


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Bob Harman




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PostPosted: Mar 22, 2017 09:10    Post subject: Re: Help identify from tunisia  

Looks to me like a small broken piece of massive quartz with rusty iron staining. BOB
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John Betts




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PostPosted: Mar 22, 2017 09:30    Post subject: Re: Help identify from tunisia  

Please test for hardness. That will narrow down the possibilities.
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John S. White
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PostPosted: Mar 22, 2017 10:06    Post subject: Re: Help identify from tunisia  

I agree with Bob but it could be sulfur. If so it will be very soft and a piece of it will burn.
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Marouenca




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PostPosted: Mar 22, 2017 10:14    Post subject: Re: Help identify from tunisia  

It's hard and does not burn.
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John S. White
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PostPosted: Mar 22, 2017 10:22    Post subject: Re: Help identify from tunisia  

Quartz
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John S. White
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Vinoterapia




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PostPosted: Mar 22, 2017 10:22    Post subject: Re: Help identify from tunisia  

To my eyes it looks like calcite, you may try a hardness test, or just drop in a little of vinegar to find out if there is any reaction. If it is calcite you would see the (slow) formation of bubbles
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Marouenca




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PostPosted: Mar 23, 2017 04:21    Post subject: Re: Help identify from tunisia  

I put it in a little vinegar and i can see the slow formation of bubble
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