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17 Nov-16:36:41 Re: new generation for picture - ploum (Ploum)
17 Nov-15:04:34 Re: don lum collection (Don Lum)
17 Nov-14:44:42 Re: worm casings? fossilized? (Kevin Schofield)
17 Nov-13:25:21 Re: unsure of mineral or stone, found in northeastern colorado (Birdbrain59)
17 Nov-13:21:28 Re: worm casings? fossilized? (Birdbrain59)
17 Nov-12:30:01 Re: collection of tobi (Jose Luis Jara Jara)
17 Nov-12:25:14 Re: new generation for picture - ploum (Jose Luis Jara Jara)
17 Nov-08:47:12 Re: worm casings? fossilized? (Alfredo)
17 Nov-06:39:59 Re: worm casings? fossilized? (R Saunders)
17 Nov-05:39:56 Re: collection of tobi (Tobi)
17 Nov-05:09:00 Re: collection of tobi (Tobi)
17 Nov-04:24:08 Re: new generation for picture - ploum (Ploum)
16 Nov-20:37:19 Re: unsure of mineral or stone, found in northeastern colorado (Tom Tucker)
16 Nov-18:34:09 Re: unsure of mineral or stone, found in northeastern colorado (Bob Carnein)
16 Nov-17:54:47 Re: worm casings? fossilized? (Stumptownjoe)
16 Nov-17:33:07 Re: worm casings? fossilized? (Vic Rzonca)
16 Nov-17:19:45 Re: worm casings? fossilized? (Stumptownjoe)
16 Nov-17:02:11 Re: worm casings? fossilized? (Vic Rzonca)
16 Nov-16:42:42 Re: unsure of mineral or stone, found in northeastern colorado (Sante Celiberti)
16 Nov-16:02:54 Re: worm casings? fossilized? (Stumptownjoe)
16 Nov-16:00:09 Worm casings? fossilized? (Stumptownjoe)
16 Nov-14:07:00 Re: new generation for picture - ploum (Ploum)
16 Nov-13:40:31 Re: don lum collection (Don Lum)
16 Nov-12:34:46 Re: collection of fiebre verde - chivor (#748) (Fiebre Verde)
16 Nov-12:22:22 Re: collection of philippe durand (Philippe Durand)

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I want to know the name of this rock.
  
  Index -> FOR BEGINNERS: What is it? Where is it from?
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Bernardo_Azevedo




Joined: 24 Aug 2019
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Location: Rio de Janeiro

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PostPosted: Sep 06, 2019 19:11    Post subject: I want to know the name of this rock.  

Hi,

I collected them in Minas Gerais (Brazil) or Rio de Janeiro (Brazil), I don't remember. I think that was in Minas Gerais.

The colour is grey and white.

Texture: Grainy crystals.



foto2.jpg
 Mineral: I don't know
 Locality:
Brazil
 Dimensions: 5 cm
 Description:
Minas Gerais or Rio de Janeiro
 Viewed:  941 Time(s)

foto2.jpg


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Bernardo_Azevedo




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PostPosted: Sep 06, 2019 19:14    Post subject: Re: I want to know the name of this rock.  

Another photo (same rock)


foto.jpg
 Mineral: Another photo
 Locality:
Brazil
 Dimensions: 5 cm
 Description:
Minas Gerais or Rio de Janeiro
 Viewed:  937 Time(s)

foto.jpg


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Carles Millan
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Joined: 05 May 2007
Posts: 1297
Location: Catalonia


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PostPosted: Sep 07, 2019 03:12    Post subject: Re: I want to know the name of this rock.  

Hi!

We understand your desire to know what your samples are, but it is too difficult to determine this from photos. If you have a rock shop nearby, or a lapidary club, we would suggest you go there to ask. In case for some reason you can't join a club then you can also try this other web page: https://www.reddit.com/r/whatsthisrock

You can also read Asking: "What is this? / Where is it from?" and provide us with some basic information about the specimen.

We want to help those who are truly curious, but people must demonstrate their curiosity by providing us with key information before we can help them.

Sorry to be so strict but we receive too many queries from people asking more or less similar questions and finally we are a bit overwhelmed by it.
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Bernardo_Azevedo




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PostPosted: Sep 07, 2019 09:05    Post subject: Re: I want to know the name of this rock.  

Thanks for advices.

Greetings.
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Kevin Schofield




Joined: 05 Jan 2018
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Location: Beacon NY

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PostPosted: Sep 16, 2019 09:19    Post subject: Re: I want to know the name of this rock.  

Notwithstanding Carles' caution, I think I can say with some certainty that these are pieces of quartzite...a sedimentary rock made up largely of quartz.
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Gail




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PostPosted: Sep 16, 2019 10:06    Post subject: Re: I want to know the name of this rock.  

I am more motivated by a question, asking for a favor, to end with PLEASE.
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Minerals you say? Why yes, I'll take a dozen or so...
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Bernardo_Azevedo




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PostPosted: Sep 16, 2019 12:01    Post subject: Re: I want to know the name of this rock.  

Kevin Schofield wrote:
Notwithstanding Carles' caution, I think I can say with some certainty that these are pieces of quartzite...a sedimentary rock made up largely of quartz.



Thank you very much.

Muito obrigado.
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