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Is it possible to tell a nature made pearl from a cultured pearl without cutting it open?
  
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trtlman




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PostPosted: Oct 21, 2017 01:54    Post subject: Is it possible to tell a nature made pearl from a cultured pearl without cutting it open?  

I know a cultured pearl is basically a real pearl since the mollusk uses the same process to make it. So if this is true then wouldn’t both a cultured pearl and nature made pearl have that gritty feeling when doing the teeth rest? I am getting conflicting information from the internet on this. A lot of websites are using that test to tell natural pearls, being cultured or nature made, from faux pearls. A lot of websites are using this test to tell cultured from natural calling cultured pearls fake pearls. I am beginning to think the term fake pearl is thrown around too much. So to my point. If a pearl is gritty is it nature made or does that just mean it’s actually made by a mollusk either in nature or a farm? My guess is that cultured and nature are gritty and that there is no way to know the difference aside from opening it up to view Nuclei.
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Riccardo Modanesi




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PostPosted: Oct 21, 2017 03:54    Post subject: Re: Is it possible to tell a nature made pearl from a cultured pearl without cutting it op  

Hi Trtlman!
I should tell you something before answering you: I think this forum does't deal with pearls or organic materials used as gemstones or ornamental material. However I can answer you there is no proof but submitting the pearl to a X-ray diffraction or to a radiography. The book (written by Maggie Campbell Pedersen about pearls and organic materials used as gemstones) can help you well.
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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trtlman




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PostPosted: Oct 21, 2017 11:52    Post subject: Re: Is it possible to tell a nature made pearl from a cultured pearl without cutting it op  

I didn’t know if anyone would know anything about pearls here but they are a mineral so someone here may know about them and did post it in the off topic section. Thanks for your input, that probably would work.
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lluis




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PostPosted: Oct 21, 2017 12:15    Post subject: Re: Is it possible to tell a nature made pearl from a cultured pearl without cutting it op  

I am chemist
When a kid, I worked for a dealer in gems.
There, I have heard same as was said: simply a radiography will tell if natural or cultured..
That is more than 43 years ago, not exactly yesterday....
Besides, at present mainly pearls in commerce are cultured ones. or so have been said to me....

On the other side, well, that a pearl is a mineral, depends in what you consider a mineral..
It is a animal product, and to me, not a mineral...
As weinstein, the tartrate of potassium in wine is not a mineral, because it is man-made...
Curious, but just that...

With best wishes

Lluís
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Roger Warin




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PostPosted: Oct 21, 2017 16:04    Post subject: Re: Is it possible to tell a nature made pearl from a cultured pearl without cutting it op  

and because tartrate is an organic compound.
Roger.
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lluis




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PostPosted: Oct 21, 2017 16:42    Post subject: Re: Is it possible to tell a nature made pearl from a cultured pearl without cutting it op  

There are many minerals, with IMA names, approved in class IX in Strunz or Weiss system...
Weinstein in wine bottles, it is not a mineral to me. But the occurring in nature, it is....

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Lluís
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