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Cutting diamonds
  
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Tom Mazanec




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PostPosted: Dec 31, 2020 13:09    Post subject: Cutting diamonds  

What determines whether a big diamond is divided up or made into a big jewel? For example, why was the Cullinan cut up into nine big gems (and bipity-bip tiny ones) instead of one or two monsters?
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John Betts




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PostPosted: Dec 31, 2020 13:26    Post subject: Re: Cutting diamonds  

To maximize the total weight of "clean" gemstones. Search on "Rough Diamond Planning" to understand why two or three gemstones are made from a single diamond.
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Don Lum




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PostPosted: Dec 31, 2020 14:51    Post subject: Re: Cutting diamonds  

Not exactly the same theme but very interesting program on CNBC, Streets of Dreams with Marcus Lemonis, Diamond District in NY, 47th Street. Season 1, Episode 1, 12/29/2020.
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PostPosted: Jan 01, 2021 10:05    Post subject: Re: Cutting diamonds  

I had always thought it was down to the crystal structure of the initial stone and how best to cleave it, getting the best 'light' from the stones cleaved from it, and in the end, maximizing the value of the resulting stones.

But I know nothing about the subject, so that is just my conjecture
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Jordi Fabre
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PostPosted: Jan 01, 2021 15:00    Post subject: Re: Cutting diamonds  

Roger Warin wrote:

Hello,

Historically, the position of the cleavage was a decisive first step.
The problem is difficult to solve when the stone is very expensive. It takes several months of study if not more, the responsibility of the cutter is great.
I advise you to ask your question Eddy Vleeschdrager, an expert from Antwerp.
He has been a friend for several decades. I meet him regularly.
He is as friendly as possible and very helpful.
Roger.

Expert Diamond | CURR.VITAE | Eddy Vleeschdrager Curriculum Vitae (expert-diamond . com)

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Roger Warin




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PostPosted: Jan 01, 2021 17:00    Post subject: Re: Cutting diamonds  

Hello diamond lovers
Here are some specimens.



06-Diamants_3219_R2.jpg
 Mineral: Diamond
 Description:
SMM Show
 Viewed:  479 Time(s)

06-Diamants_3219_R2.jpg



Diamant#2bis-B_R.jpg
 Mineral: Diamond
 Description:
 Viewed:  477 Time(s)

Diamant#2bis-B_R.jpg



Diamant#2d_R.jpg
 Mineral: Diamond
 Description:
 Viewed:  477 Time(s)

Diamant#2d_R.jpg



Diamant_0105_R.jpg
 Mineral: Diamond
 Locality:
Mirny Mine, Mirny, Mirninsky District, Sakha Republic (Yakutia), Russia
 Description:
SMM Show
 Viewed:  476 Time(s)

Diamant_0105_R.jpg



Diamant-4.jpg
 Mineral: Diamond
 Description:
twin
 Viewed:  477 Time(s)

Diamant-4.jpg



Diamant-4z.jpg
 Mineral: Diamond
 Description:
 Viewed:  477 Time(s)

Diamant-4z.jpg



Diamant-5bis.jpg.jpg
 Mineral: Diamond
 Description:
 Viewed:  478 Time(s)

Diamant-5bis.jpg.jpg



Diamant_7900_2_R.jpg
 Mineral: Diamond
 Description:
fluorescent
 Viewed:  476 Time(s)

Diamant_7900_2_R.jpg


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