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13 Dec-22:09:25 Re: percentage of minerals known (Alfredo)
13 Dec-17:59:43 Re: prospecting pegmatite for schorl: need help. (Cascaillou)
13 Dec-16:01:15 Re: prospecting pegmatite for schorl: need help. (Josele)
13 Dec-15:58:23 Re: minerals of dr congo, katanga. (Roger Warin)
13 Dec-13:53:58 Re: minerals of dr congo, katanga. (Roger Warin)
13 Dec-13:27:15 Re: prospecting pegmatite for schorl: need help. (Peter Lemkin)
13 Dec-12:54:37 Re: need help determining what this is (John Betts)
13 Dec-12:54:13 Re: need help determining what this is (Vic Rzonca)
13 Dec-12:46:02 Re: minerals sans life (Pierre Joubert)
13 Dec-12:25:09 Need help determining what this is (Billclutch)
13 Dec-11:42:42 Re: prospecting pegmatite for schorl: need help. (Peter)
13 Dec-09:32:14 Re: collection of michael shaw (Crosstimber)
13 Dec-08:13:27 Re: franjungle collection (Franjungle)
13 Dec-08:03:36 Re: collection of tobi (Tobi)
13 Dec-08:02:45 Re: prospecting pegmatite for schorl: need help. (Cascaillou)
13 Dec-07:50:05 Re: collection of tobi (Tobi)
13 Dec-07:23:09 Re: coal with metallic inclusion (Alfredo)
13 Dec-06:48:29 Re: coal with metallic inclusion (Stan Feng)
13 Dec-04:13:05 Re: minerals sans life (James)
13 Dec-01:23:55 Re: micro photos of inclusions in quartz (Zbhjzm)
13 Dec-00:22:20 Re: minerals sans life (Duncan Miller)
12 Dec-22:57:46 Re: collection of michael shaw (Nunzio)
12 Dec-21:31:06 Re: coal with metallic inclusion (Matt_zukowski)
12 Dec-17:03:53 The mizunaka collection - fluorite (Am Mizunaka)
12 Dec-16:24:03 Re: prospecting pegmatite for schorl: need help. (Peter)

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Any idea about this
  
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Marouenca




Joined: 22 Mar 2017
Posts: 21
Location: Tunisia

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PostPosted: Mar 27, 2017 05:13    Post subject: Any idea about this  

Hi i found this in a canyon and i dont have any idea about it and the color looks strange


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Riccardo Modanesi




Joined: 07 Nov 2011
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PostPosted: Mar 27, 2017 05:28    Post subject: Re: Any idea about this  

Hi Marouenca!
Personal opinion: goethite and calcite (or quartz). Try with vinegar or muriatic acid, see whether it fizzes.
Greetings from Italy by Riccardo.

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Hi! I'm a collector of minerals since 1973 and a gemmologist. On Summer I always visit mines and quarries all over Europe looking for minerals! Ok, there is time to tell you much much more! Greetings from Italy by Riccardo.
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Pierre Joubert




Joined: 09 Mar 2012
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PostPosted: Mar 27, 2017 06:29    Post subject: Re: Any idea about this  

Try holding the specimen a little bit further from the camera (you can always crop it afterwards); this should help with the focusing. When you hold it too close, the camera focuses on certain points instead of the whole specimen. Nice, interesting specimen.
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