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What is it?
  
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wade




Joined: 24 Jun 2010
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PostPosted: Jun 24, 2010 22:27    Post subject: What is it?  

At Pomona show I saw some Chinese mineral dealers selling this pink stuff, it is cheap but don't know what is it? Is it labgrow?


Pink material China 1.jpg
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Pink material China 1.jpg



Pink material China 2.jpg
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Pink material China 2.jpg


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Jordi Fabre
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PostPosted: Jun 25, 2010 00:11    Post subject: Re: What is it?  

Yes, it is labgrow. We analyzed it and it is an impossible chemical composition to be natural. When I'll back to Barcelona I will publish copy of the analysis here.
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Andreas Gerstenberg




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PostPosted: Jun 28, 2010 15:23    Post subject: Re: What is it?  

Hi,

these "cuties" are often labelled "corundum" or "ruby". As Jordi wrote, it´s a synthetic "mineral"...

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Andreas
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Jordi Fabre
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PostPosted: Jun 29, 2010 02:13    Post subject: Re: What is it?  

Here is the analysis. Is a "Corundum" intergrown with "Fluorite". The paragenesis is near impossible and the Fluorite looks like molten, so = synthetic.


Analysis pink material from China.jpg
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Upper analysis = "Corundum"
Lower analysis = "Fluorite"
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Analysis pink material from China.jpg


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Michelle




Joined: 27 Jun 2010
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PostPosted: Jun 29, 2010 03:47    Post subject: Re: What is it?  

Hi,We called it Lepidolite.
hardness:2.5-3 specific gravity:2.8-3.3
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Paul S




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PostPosted: Jun 29, 2010 08:05    Post subject: Re: What is it?  

This is interesting stuff, it looks nice; clear crystals in and on a matrix. I'm wondering though if it is a by-product of some industrial process or wether these specimens were made on purpose?

The lepidolite photo's I saw on Mindat didn't look like the photo posted here, is it really the same stuff but synthetic?
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nitana2000




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PostPosted: Aug 13, 2010 10:09    Post subject: Re: What is it?  

Michelle wrote:
Hi,We called it Lepidolite.
hardness:2.5-3 specific gravity:2.8-3.3

Hello to all.

Well, In this case the difference in hardness is easy to see. This mineral scratches glass.
The matrix is difficult to see and catalog and we can see holes on it.

The Lepidolite is a discredited mineral by the IMA.

Sorry for not make best photos...

Best regards from South of Spain...



Lepidolite 1.jpg
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Lepidolite 1.jpg



Lepidolite 2.jpg
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Lepidolite 2.jpg



Lepidolite 3.jpg
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Lepidolite 3.jpg



Lepidolite 4.jpg
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Lepidolite 4.jpg



Lepidolite 5.jpg
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holes in the matrix
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Lepidolite 5.jpg


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Perritovm




Joined: 04 Mar 2013
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PostPosted: Mar 04, 2013 17:05    Post subject: Re: What is it?  

Estimated Jordi, thanks for the analisys of such very rare specimen, please do you know the level of cromiun present in the corundum? I will really appreciate if such information could be given by you in this post. Thanks in advance....
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Jordi Fabre
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PostPosted: Mar 04, 2013 18:01    Post subject: Re: What is it?  

Sorry, we have not other analysis than the analysis published here -> http://www.mineral-forum.com/message-board/viewtopic.php?p=12338#12338 , when we saw that the sample was synthetic we didn't anything else.
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Perritovm




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PostPosted: Mar 05, 2013 14:16    Post subject: Re: What is it?  

Understood estimated Jordi, but really using fluorite is one ultrasmart choice, congrats to the maker of this synthetic, if in someway you can sent to me one small piece, I will be glad to obtain the quantity of chromiun present on ruby crystal in chinese pink material if possible. In the other hand the "artifact" described in the other post, extremelly resenble to ramaura rubies, and I thind the green material is PbF2 overcharged with excess of chromiun, the crystal habit and paragenesis is matching the synthesis of corundum in laboratories from

PbF2-PbO fluxes plus some bismuth used in ramaura Labs

PbF2 produces corundum plates
PbO produces equidimensional preferably crystals

ANDRES

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Perritovm




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PostPosted: Apr 01, 2013 22:37    Post subject: Re: What is it?  

Nice material 2
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