October 27-28—SACRAMENTO, CALIFORNIA: 82nd Annual Gem, Jewelry, Mineral and Rock Show; Sacramento Mineral Society; Sat. 10-5, Sun. 10-4
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 Post subject: Diamond Sphere / Cabochon
PostPosted: Thu Jun 18, 2015 4:06 am 
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Hi Guys,

I'm looking for a machine that can cut sphere/cabochon diamonds?
Have someone heard of this kind of machines?
After a big research only I could find is all the other gemstones spheres machines, but nothing for diamonds.

Any info would be welcome
Thank you


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 Post subject: Re: Diamond Sphere / Cabochon
PostPosted: Fri Jun 19, 2015 7:43 am 
They are round mostly and done by bruting on a diamond bruting machine.


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 Post subject: Re: Diamond Sphere / Cabochon
PostPosted: Sat Jun 20, 2015 7:49 pm 
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I think one could be specially built for that purpose.
Money talks.

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 Post subject: Re: Diamond Sphere / Cabochon
PostPosted: Wed Jul 29, 2015 4:03 pm 
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Already built in Germany. First time I saw polished diamond spheres must have been in the early nineties.

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 Post subject: Re: Diamond Sphere / Cabochon
PostPosted: Thu Jul 30, 2015 11:31 am 
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Conny Forsberg wrote:
Already built in Germany. First time I saw polished diamond spheres must have been in the early nineties.

Who manufactures the machine?

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 Post subject: Re: Diamond Sphere / Cabochon
PostPosted: Thu Jul 30, 2015 11:43 am 
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Use a normal sphere making machine but have a spare pair of tools of charged with diamond dust and cut away. Alternatively, if you don't need many, buy them from a dealer, much cheaper than a machine and diamond rough.


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 Post subject: Re: Diamond Sphere / Cabochon
PostPosted: Thu Jul 30, 2015 11:52 am 
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Alternatively, if you must have a sphere cutting machine (and I suppose it would be useful for cutting beads in all sorts of precious and semi precious material), try 'phoning Otto Simon in Idar Oberstein ++49678141141. They have a couple of english speakers on the staff so that isn't a problem.


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 Post subject: Re: Diamond Sphere / Cabochon
PostPosted: Thu Jul 30, 2015 1:04 pm 
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No idea who built the machine Thomas. It was a Idar-Oberstein company, that much I know. Bought some stuff from them but at the time I could not afford one of the spheres.

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 Post subject: Re: Diamond Sphere / Cabochon
PostPosted: Thu Jul 30, 2015 1:08 pm 
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http://www.serendipitydiamonds.com/blog ... ike-pearl/


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 Post subject: Re: Diamond Sphere / Cabochon
PostPosted: Thu Jul 30, 2015 1:41 pm 
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Thanks Barbra! Interesting the diamond experts were as surprised/impressed in 2014 as I was when I saw one in the mid nineties... :)

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 Post subject: Re: Diamond Sphere / Cabochon
PostPosted: Thu Jul 30, 2015 3:50 pm 
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Interesting, but as Connie says, hardly new, in fact I was offered a couple (in Idar Oberstein) back in 2008. I suppose the difference here is the even colour and appearance.


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 Post subject: Re: Diamond Sphere / Cabochon
PostPosted: Thu Jul 30, 2015 3:58 pm 
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It's new to those who have never seen it before. :wink:


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 Post subject: Re: Diamond Sphere / Cabochon
PostPosted: Thu Jul 30, 2015 4:36 pm 
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I suspect it's the sort of thing that will probably "only" be a curiosity (no offense to curiosities, of course!), so it's easy for someone to miss out on its 15-minute notability each time it comes out.


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 Post subject: Re: Diamond Sphere / Cabochon
PostPosted: Thu Jul 30, 2015 10:55 pm 
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Likely it was manufactured with a lapidary sphere making machine. I would think the the process was very long and wore out many sintered diamond tools.
This is very interesting: http://www.diamantschleiferei.de/
The family's name is Hahn, my maternal grandfather's name and his father was from the same area in Germany.

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 Post subject: Re: Diamond Sphere / Cabochon
PostPosted: Fri Jul 31, 2015 8:34 am 
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Barbra Voltaire wrote:
It's new to those who have never seen it before. :wink:


Reminds me of my old chemistry lecturer, who used to declare, with an acerbic note in his voice "Do keep up at the back!". Made us swots smile, I can tell you!


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