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Corundum? Diamond?
  
  Index -> FOR BEGINNERS: What is it? Where is it from?
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KimberleeAnn




Joined: 19 Nov 2018
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PostPosted: Nov 19, 2018 16:53    Post subject: Corundum? Diamond?  

Hello!!

I am new to this forum but am very much looking forward to learning and looking at everyone's finds!!

I am curious at your thoughts on this beauty... I know it is trapiche, looks like yellow and purple from initial brushing. It is much smoother and a finer texture than many other examples I have been cleaning up. It definitely has a sheen to it similar to that of diamond.
In looking at the crystals with 60 - 100 magnification the crystal shape is more diamond than hexagonal. I have not tested streak, I know it is very hard but both corundum and diamond are.
Please tell me your thoughts!
Thank you!
Kim



trapiche2.jpg
 Description:
This is a rather large piece
5" X 2.5" X 2"
 Viewed:  625 Time(s)

trapiche2.jpg



trapiche.jpg
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trapiche.jpg


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Gail




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PostPosted: Nov 19, 2018 17:14    Post subject: Re: Corundum? Diamond?  

I can’t see much as it’s blurry on my iPhone.
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Minerals you say? Why yes, I'll take a dozen or so...
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Pete Modreski
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PostPosted: Nov 19, 2018 17:44    Post subject: Re: Corundum? Diamond?  

Dear Kim,

We should point out, that this Forum is for mineral collectors, and is really focused on (for the most part) sharing information about crystallized mineral specimens. It is not really a "gemstone" forum, so I don't think it's going to be a good source of information or comments for you, about your (potential?) gem specimens.

And as Gail said, your photos really are not sharp enough for us to tell anything about just what your material is--in fact, I don't think we can really even tell, whether you are speaking about the entire specimens, or just (one?) small crystal grain(s) within it.

Speaking in all politeness, I'd suggest that you look for some other online discussion group, more focused on gemstones, where you might get some more useful information to you. The photos you posted are really pretty much "off topic" for us. (And, P.S., as you'll read in our "For Beginners" page, any photos we post here, really need to be accompanied by the information about "where exactly is the specimen from", in addition to the poster's best attempt to do share the results of the simple mineralogical tests described therein, that others can use as guides as to what the specimen might be.

Sincerely, Pete
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KimberleeAnn




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PostPosted: Nov 19, 2018 17:59    Post subject: Re: Corundum? Diamond?  

Thank you
I am interested in the mineral specimen not only gemstones. But I get your point. I have many different varieties if minerals and fossils.
I havent sold a one ir even tried to this point. I am just interested in identification at this point.
I have collected rocks for years. Maybe I am in the wrong forum again.
The fossil forum was just about as welcoming as you have been.
Thanks for your time.
Kim
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John Betts




Joined: 07 Jun 2012
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PostPosted: Nov 19, 2018 20:05    Post subject: Re: Corundum? Diamond?  

I suggest reading my article (online):
Do You Think You Found a Diamond? Learn How to Identify Rough Diamonds
http://www.johnbetts-fineminerals.com/jhbnyc/diamondtest.htm
(link normalized by FMF)

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SteveB




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PostPosted: Nov 20, 2018 00:29    Post subject: Re: Corundum? Diamond?  

All I see from your photo is a chunk of quartz. Why havent you done a streak test, or any other since you are aware? A photo alone is useless and if you cant put in basic effort why expect anyone else to spend time on it. Take good photos, do the tests, and post results.
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Tobi




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PostPosted: Nov 20, 2018 02:33    Post subject: Re: Corundum? Diamond?  

Hi Kim,

No matter what you collect or if this is the right forum for you: this rock is neither corundum nor diamond - for sure ;-)

I agree with Steve that it is most likely an ordinary piece of quartz ...

Tobi
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Peter Lemkin




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PostPosted: Nov 20, 2018 02:49    Post subject: Re: Corundum? Diamond?  

Don't be too offended by the replies. Sorry none of them are encouraging. The fact is diamonds are very rare. I agree what you have shown looks like quartz and not a diamond. A diamond of that size would be one of the handful of largest ever found - making the find a one in a few million or billion chances, statistically. It is also not corundum from the photo. As others have suggested, do some tests [hardness, specific gravity, streak, etc.] and if you really feel we are wrong find a website that specializes in gemstones. Lastly, Diamonds are almost NEVER found except in locations where other diamonds have been found and where there are Kimberlite pipes or similar. They are not ubiquitous in their distribution - not at all.
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