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Rose Quartz, Morganite or other?
  
  Index -> FOR BEGINNERS: What is it? Where is it from?
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Andreu




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PostPosted: May 20, 2020 15:36    Post subject: Rose Quartz, Morganite or other?  

Hi,

Can someone identify this specimen?

This is my first post in the forum. Some time ago I bought a specimen thinking it was massive rose Quartz. The seller told me he was not sure it was. I always had the doubt that it was or not, as it looks quite different from other pieces of non crystallized rose Quartz that I had. I tried scratching it with quartz and I could not, but I was able to scratch quartz with it. I also tried scratching with Morganite and even Topaz but the scratching edges crush before scratching this specimen. The surface (I think it is called luster) sometimes reminds me of Obsidian. I attach some photos.

Thanks and regards,
Andreu
Barcelona



Quartz 1.jpg
 Mineral: Rose Quartz1
 Dimensions: 15 cm
 Description:
 Viewed:  807 Time(s)

Quartz 1.jpg



Quartz 2.jpg
 Description:
 Viewed:  806 Time(s)

Quartz 2.jpg



Quartz 3.jpg
 Description:
 Viewed:  809 Time(s)

Quartz 3.jpg



Quartz 4.jpg
 Description:
 Viewed:  807 Time(s)

Quartz 4.jpg



Quartz 5.jpg
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Quartz 5.jpg


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Josele




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PostPosted: May 20, 2020 16:22    Post subject: Re: Rose Quartz, Morganite or other?  

Hola Andreu, welcome to FMF.
Some pics seem show cleavage planes and others show conchoidal fracture...
Without reconocible faces is hard to say what it could be.
Do you know the locality of origin?
Where it was bought?
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Andreu




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PostPosted: May 20, 2020 16:28    Post subject: Re: Rose Quartz, Morganite or other?  

Hello Josele,

Thanks for your answer!

I have no idea where it comes from. I bought it in the annual fair in Narbonne / France, at the stalls where private collectors sell and exchange speciments. It costed me 5 EUR, so I assumed it was rose Quartz, but I have my doubts (and the seller also had them).

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Andreu
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Pete Richards
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PostPosted: May 20, 2020 20:37    Post subject: Re: Rose Quartz, Morganite or other?  

Without knowing where it is from, with no crystal form to go on, this is a puzzle that probably cannot be solved short of expensive tests like x-ray analysis. Indices of refraction or density might distinguish between the two, if you can find someone to do those tests. These two minerals are not greatly different in either of these properties, which makes a definite determination quite difficult. Perhaps the best optical criterion is that quartz is uniaxial positive but beryl is uniaxial negative.

In my experience, hardness tests with relatively hard minerals (quartz (7) or harder) are difficult to do reliably, exactly because of the crumbling you mention of the mineral that is supposed to do the scratching.

This looks like a lot of rose quartz I have seen. I haven't seen enough morganite to say whether it looks like morganite or not.

I would think the best indicator of its identity is the price you paid for it. I suspect the dealer was playing games with you when (s)he supported your doubts about the identity. "Wow, I'm not sure. You might have found a real bargain here!".

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Collecting and studying crystals with interesting habits, twinning, and epitaxy
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Volkmar Stingl




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PostPosted: May 20, 2020 23:29    Post subject: Re: Rose Quartz, Morganite or other?  

Clearly rose quartz!
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SteveB




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PostPosted: May 21, 2020 00:58    Post subject: Re: Rose Quartz, Morganite or other?  

I would be confident it was rose quartz and I suspect Pete is correct about the seller playing games with you as they do. Might even be a cast off from Chinese quartz manufacturing process.

Still try an acid test anyway and see if you get any reaction and I suggest you buy a good set of mineral hardness scribes rather than relying on pieces of other minerals which is ONLY meant to be a simple “in the field quick and dirty estimation test” anyway. Its not a real test that is used in mineral identification. Besides it's not a scratch that you are looking for to make determination, sound plays a part too.
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Rugie




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PostPosted: May 21, 2020 10:03    Post subject: Re: Rose Quartz, Morganite or other?  

Why don't you try fusibility? Beryl (morganite) is difficultly fusible while Quartz is infusible.
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Jordi Fabre
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PostPosted: May 21, 2020 12:35    Post subject: Re: Rose Quartz, Morganite or other?  

SteveB wrote:
...Might even be a cast off from Chinese quartz manufacturing process...

It looks a lot like a Quartz (rose or pale rose doesn't matter: Quartz 😉 )
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SteveB




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PostPosted: May 22, 2020 00:38    Post subject: Re: Rose Quartz, Morganite or other?  

Rugie wrote:
Why don't you try fusibility? Beryl (morganite) is difficultly fusible while Quartz is infusible.


Dangerous and irresponsible advice. Quartz reacts explosively, he could easily end up blind taking your advice.
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Andreu




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PostPosted: May 23, 2020 12:04    Post subject: Re: Rose Quartz, Morganite or other?  

Thank you all for your answers and suggestions!

So rose Quartz!

Regarding the probes for scratching, I will consider it. Spending 100EUR in a nice specimen is ok but for the scratch probes I feel it a bit painful :-)

Andreu
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