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 Rough diamond prices |
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 How to determine the purchase price for a rough diamond? |
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| We will try to give you some information relating to the
various criteria which can intervene in the calculation of the price of the rough diamond. |
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 Criteria |
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| The principal criteria which can influence the purchase
price of rough diamonds are: |
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 Where the transaction takes place i.e. Africa,
Europe, CIS, USA or other foreign locations. |
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Where is the location of the physical
transference of the rough diamonds? |
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What is the method of payment: wire transfer,
cash, C.O.D., etc...? |
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Costs of buying rough diamonds: travel,
hotel, negotiations, etc... |
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The crystalline structure of rough diamonds. The
most important part regarding buying or selling of rough diamonds, is to know the basic structures
(crystals): stones, shapes, cleavages, macles, flats. |
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| The good classification of the crystalline structure of
rough diamonds is determining the calculation of the purchase price, indeed all crystalline
shapes of diamonds do not have the same yield. The stone structure will yield approximately
50 percent of the finished diamond, the shapes structure will yield 45 percent, the cleavages
structure will yield 35 percent, the macles structure will yield 28 percent and the flats
structure will yield 25 percent of the finished diamond. |
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| Pricing example |
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| Mode of calculation for the purchase of a rough diamond (all the prices
below are false): |
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If someone would offer us a 5 carats rough diamond,
for example, stone structure, VS2 and G colour. |
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The stone structure we will yield approximately
50 percent of the finished diamond:
5 carats (rough) x 0.50 (50 %) = 2.50 carats (polished). |
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If we decide to cut the octahedron in half to yield two equal finished stones:
2.50 carats ÷ 2 = 1.25 carat (for each polished diamond). |
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The Rapaport value for a 1.25 carat, VS2, and G
colour is US$2,500/carat:
2,500 x 1.25 = US$3,125 (for each stone). |
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This type of stone will yield 2 X 1.25 carat
stones:
US$6,250 (3,125 x 2). |
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We will discount the Rapaport value by 40 percent
to obtain the wholesale market price:
1.25 x 2,500 x 0.60 (- 40 %) = US$1,875 (for one diamond), total US$3,750 (for two polished diamonds). |
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To obtain our purchase price for this rough diamond
of 5 carats, it is necessary to apply a percentage which will correspond to our profit margin (on average
it is best at 50%):
3,750 x 0.50 =
US$1,875 (this is our purchase price for this rough diamond). |
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The purchase price per carat for this rough
diamond is:
1,875 ÷ 5 carats = US$375 per carat. |
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| Rough diamond prices list |
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| We offer lists which give the price of rough diamonds per carat
according to various criteria, such as: the crystalline shape, the rough weight, the
colour and the clarity. It is possible to to subscribe at these price lists.
Over 20,000 prices are published. The prices showing on this list below are not real prices. |
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| Each diamond chart for every category will give you the following: |
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The rough diamond weight. |
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An image of the crystalline structure. |
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A description of the crystalline structure. |
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The number of finished stones. |
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The calculated weight of the polished and finished diamond. |
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The maximum values per carat for that rough diamond. |
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The colour scale. |
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The clarity scale. |
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| If you want to subscribe to these rough diamond price lists, please
click on this link rough diamond price lists. |
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| Rough diamond prices simulator |
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| We offer you a simulator of prices (see images below) for
the purchase of rough diamonds which is accessible on subscription. Very easy to use, specify the
crystalline shape of rough diamond, its weight, its colour and its clarity and
the simulator calculates the purchase price of this rough diamond. |
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| The simulator will: |
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Give you the total weight of the finished stones. |
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Give you the total value of the rough diamond purchase. |
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Give you the ability to alter the profit margins for the purchase and sale of the rough diamond. |
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Give you an overview of all structures (stones, shapes, cleavages, flats, and macles), all of them can be analyzed. |
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Give you a rough diamond purchase price in the local currency of your choice. |
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Give you a purchase price for 1 rough diamond or a parcel. |
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| If you want to subscribe to this rough diamond prices simulator,
please click on this link rough diamond prices simulator. |
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0.22 carat F-VS1 |
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1.17 carat F-VS1 |
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1.71 carat F-VS1 |
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0.28 carat D-VS1 |
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1.70 carat F-VS2 |
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| Price: £ 165 |
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| Price: £ 4,861 |
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| Price: £ 15,963 |
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| Price: £ 246 |
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| Price: £ 8,456 |
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