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PostPosted: Mon Dec 21, 2009 7:45 pm 
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i understand that liric.
they can buy bulk quantities and have bigger discounts.they are more competitive? in buying they are, in selling i might not agree with you.diamonds have price list so they will not sell theyr diamonds cheaper than apears on the list(whats the point of doing that list himselves to breack theyr own rules).
so the point is you will sell the diamonds at same price, you fallow the same chart very probably.
if you can get or are an awsome diamond cutter you can sell diamonds at higer price,than most of those cartels.
to sell them do the same you do to sell colored stones.selling tactic probably is the same.
your profit will be bigger than theyr´s?no.cause they buy rough cheaper.
but better stay way from diamonds, at least it´s waht i did in your place


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PostPosted: Tue Dec 22, 2009 9:13 am 
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Pedro,

There is no Rappaport list or selling list that I know of if you buy rough diamonds, even in New York.

And yes, I stay away from diamonds all together unless I have a client for it or I need some side stones or melees for a project. Then I use Rapaport as a guide line and trust the dealers I work with.

There are so many parameters in diamonds that the Rapaport can be used as a guide line only. Some cuts as well as many other factors will affect the premiums or discounts.

Now in the exceptional, you do have dealers in NY specializing in that too,
for instance Ashoka cut, Jubilee cut (with exceptional cut and polish) etc...
If you want some unusual designer diamond material, you will also find a huge sellection in NY often from Indian dealers (competitive and interesting stuff) ....

I could not possibly be competitive in the diamond business in NY, so I don't try !


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PostPosted: Tue Dec 22, 2009 9:23 am 
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lyric wrote:
There is no Rappaport list or selling list that I know of if you buy rough diamonds, even in New York.


the goal of the rough diamond course was to analyze and evaluate rough diamonds in order to estimate the finished stone. then, by applying the cut cost one could have the value of the finished products.
ciao
alberto

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PostPosted: Tue Dec 22, 2009 10:15 am 
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Alberto,

Of course, you can analyze and evaluate the rough in order to estimate the finished stone, then applying the cut cost, you could estimate the value of the finish product.

In actuality your estimation can turn out to be more or less accurate in some cases (especially in large rough that you have to saw or cleave in several parts because of inclusions) and this is without including the risk factor while sawing, cleaving (very rarely today) or cutting. Maybe not a high risk but accidents have been known to occur.


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PostPosted: Tue Dec 22, 2009 11:07 am 
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Lyric,

my reply was indeed a simplified one.. there are various further factors involved (evaluating internal stress knots by crossed polars, just to name one..). i have to say that only after did the course i really realized how difficult could be the task, comparing to it, polished diamond grading it's far more an easy issue... :wink:
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alberto

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PostPosted: Tue Dec 22, 2009 12:00 pm 
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I more than agree with you, Alberto.

best,

Lyric


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PostPosted: Tue Dec 22, 2009 12:46 pm 
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For the one who just want to have a quick idea about the classification of rough diamond.

That course was the best for me about knowing diamond and it's complexity.

Sawable and Spotted:
Best ratability, always Octahedral or Dodecahedral shape. They are classified Sawables (SW) or Spotted (SP) depending on the inclusions (for any colors).

SW1: Crystal is nearly perfect, no deformation, all the tops are present with strait edges and no inclusions.
SW2: Same, but with inclusions hard to see with the loupe, close from the surface or an edge

SP1: Crystal nearly perfect (no deformation), inclusions will be eliminate by sawing trying to get the biggest stone possible.
SP2: Crystal nearly perfect (no deformation), inclusions will force to cut the stone in tow to get 2 small stones. There will be inclusions in each stone.

Makables:
Rough diamonds with no specific shapes. Usually roundish. With a Makable (MK) we are making only one stone. The stone is not sawed or cleaved.

MK1: Usually more or less regular round shape, no inclusion or very close to the surface (easy to eliminate)
MK2: Irregular shape, with minor inclusions harder to eliminate.

Cleavables:
Rough that will be cleaved

CL1: Any shape. Stone with inclusions in the center and / or with a cleavage starting.
CL2: Stone with many inclusions. The stone will be cleaved in many smaller stones. Will get some stone of different quality.

Macles:
Macle 1: with out inclusion
Macle 2: with inclusion

The rough diamonds are never classified as Flawless or Internally Flawless.

Best regards

Olivier


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PostPosted: Sat Jan 23, 2010 12:32 pm 
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You are all so right , I do not know much about diamonds except they are lovely . I do remember when I was child , a couple of guys going to Angola for diamonds hunting among many things ( they were soldiers) one of them did not get back ... one came back very ill and the last one was the lucky one but he move out of the neighborhood . DEFINETELY I will stay out of that bussiness .
Barbra you and the other members are good people : you all give great advices!


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PostPosted: Fri Jan 24, 2014 12:25 am 
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TheGemDr wrote:
Hello Hope1,

When I had my diamond cutting machine I had no difficulty finding plenty of damaged stones to cut. Without a bruting lathe and a saw I didn't want to spend the time that rough would need.

Tony.


Tony,

Where did you purchase your diamond cutting machine?


Thank You


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 Post subject: Re: Where to buy rough diamonds
PostPosted: Mon Mar 10, 2014 3:50 pm 
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From South Africa
To buy rough diamonds in South Africa is not difficult if:
1. You know what you doing( in depth knowledge of rough)
2. Adhere to all the processes
3. Knowledgable about the country laws
You will not end up in jail if you practice the above
South Africa has a board called the Diamond Board,
You can talk to the people there about the rules
Buyers and sellers in the country have to have diamond licenses
The possession of rough by an unlicensed person is illegal
Best to buy from government tenders in the beginning
All the best


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