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Black Diamond ?
https://www.gemologyonline.com/Forum/phpBB2/viewtopic.php?f=7&t=14943
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Author:  Whatever [ Wed Nov 23, 2011 10:36 pm ]
Post subject:  Black Diamond ?

Just have one simple question - What is Black Diamond exactly ? :)

Author:  Barbara O. Ellis [ Wed Nov 23, 2011 10:46 pm ]
Post subject:  Re: Black Diamond ?

If it's a natural diamond, it is one with numerous black inclusions lining its cleavages and fractures. There will be some colorless areas within the structure.

If it's an irradiated diamond, it will actually be a dark blue or dark green throughout with no colorless areas inside.

Author:  Barbra Voltaire, FGG [ Wed Nov 23, 2011 11:41 pm ]
Post subject:  Re: Black Diamond ?

Perhaps this old thread will shed some light.

Author:  Whatever [ Thu Nov 24, 2011 12:09 am ]
Post subject:  Re: Black Diamond ?

Thank you ladies, I read it and understood quite a bit. But tell me this, if a diamond is consist of more than 50% graphite can it still be called a diamond ?
Someone please shed some light in what cases a diamond could be called a natural black diamond ? ](*,)

Author:  Barbra Voltaire, FGG [ Thu Nov 24, 2011 12:36 am ]
Post subject:  Re: Black Diamond ?

Quote:
if a diamond is consist of more than 50% graphite can it still be called a diamond


Didn't you answer the question with the question? If a diamond contains.....it's a diamond.

Quote:
Someone please shed some light in what cases a diamond could be called a natural black diamond ?

I would define it as an untreated diamond which appears black.....like the Black Orloff

Author:  Whatever [ Thu Nov 24, 2011 1:50 pm ]
Post subject:  Re: Black Diamond ?

Alrighty, thank you :)
This one has a GIA certificate as a natural black diamond - http://www.langerman-diamonds.com/shop/ ... ed_Diamond
But I can't see any transparent area :/

Author:  Barbra Voltaire, FGG [ Thu Nov 24, 2011 2:22 pm ]
Post subject:  Re: Black Diamond ?

Ask them about it.
Perhaps they have a magnified shot they can send you.

Author:  diamondzul-diamonds [ Wed Dec 07, 2011 1:57 am ]
Post subject:  Re: Black Diamond ?

Natural diamonds which has black color it's called black diamonds.

Author:  Barbra Voltaire, FGG [ Wed Dec 07, 2011 11:44 am ]
Post subject:  Re: Black Diamond ?

diamondzul-diamonds wrote:
Natural diamonds which has black color it's called black diamonds.

Thank you for your response, a little simplistic, but I guess that rather sums it up.

Author:  cascaillou [ Wed Dec 07, 2011 4:20 pm ]
Post subject:  Re: Black Diamond ?

this being said, I think one should make the difference between a black diamond of polycrystalline structure, and a black diamond of monocrystalline structure.

Author:  Conny Forsberg [ Wed Dec 07, 2011 5:22 pm ]
Post subject:  Re: Black Diamond ?

That is right, the polycrystalline (Carbonado) is pretty different as it is not only hard, it is also tough. Like difference between rock crystal and chalcedony.

Author:  cascaillou [ Thu Dec 08, 2011 8:09 pm ]
Post subject:  Re: Black Diamond ?

boart (bort) is polycrystalline and can also be black, just like carbonado.

note that there's quite some confusion about the term 'boart' because some people use it to refer to any low quality diamond (polycrystalline or monocrystalline) while this term should only be used in reference to a polycristalline variety of diamond.
There are three polycrystalline varieties of diamond: carbonado, boart, and ballas, all three are polycrystalline but their structure is different one from another.

Author:  Whatever [ Mon Dec 19, 2011 5:40 pm ]
Post subject:  Re: Black Diamond ?

Hmm... so a diamond can have different structures, thats interesting... :D

Author:  jamesdiamonds [ Fri Dec 30, 2011 5:33 am ]
Post subject:  Re: Black Diamond ?

Black Diamonds are real genuine diamonds.They come out of the earth as Diamonds that don't look exactly black. It has enhanced and after that it become black diamonds.

Author:  Barbra Voltaire, FGG [ Fri Dec 30, 2011 11:24 am ]
Post subject:  Re: Black Diamond ?

There are naturally occurring, untreated blacks, like the Black Orlov.
Read this thread for a little clarification Jamesdiamonds:
viewtopic.php?f=7&t=13301

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