Diamond Rough

Diamond Rough Buyer ServicesOur Rough Diamond Buyer Services provides Rare White & Fancy Color Diamond Rough to select Clientele. Diamond Rough is available for acquisition Individual Stones & Parcels.

If desired, our world class artisans can cut/polish acquired Diamond Rough to the highest specifications within the Trade to achieve maximum value from the corresponding Diamond Rough. We can then submit the completed loose polished diamond(s) to the International Diamond Grading Labs for Grading and prompt sale to our existing international Clientele of: Luxury Retailers, Wholesalers, Dealers, Jewelry Designers & Select Individuals.

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DIAMOND ROUGH TRADE REPORT NOTE

Diamond Rough and Loose Polished DiamondsPlease note, that Diamond Rough Prices change on a monthly basis.

Diamond Rough Prices increased slightly over the last month solely for larger goods in excess of 6.00cts++ and additional corresponding slight increases for these larger goods are expected in the coming few weeks.  Smaller Diamond Rough pricing remained stable, in light of desired Diamond Rough Price corrections to foster Diamond Trade Market stability and discourage Diamond Rough speculation among Dealers.

De Beers & ALROSA slightly increased larger Diamond Rough pricing an average of 2.00% - 3.50% at the December 2017 Diamond Trading Company (DTC) Sight(s) & ALROSA Sight(s).  Smaller goods had correspondingly similar upward price changes that will additionally foster Diamond Trade Market Stability and discourage Diamond Rough speculation. The December 2017 Diamond Rough Sight(s) had an estimated value of $450 million for the De Beers Sight in Gaborone & $337.6 million for the ALROSA Sight, inclusive of $9 million for the additional ALROSA Sight at its new Eurasian Diamond Centre in Vladivostok.  Sight participants noted that although larger Rough demand has continued to slightly improve, lowered Loose Polished Diamond Pricing continues to create negative price pressure. Tighter International Banking Regulations over 2015-2017 operated to eliminate or reduce financing of Diamond Rough purchases from all sources from 100% to 50% or less by ABN Amro, Bank Leumi, First International Bank of Israel (FIBI), Standard Chartered, Emirates NDB, IndusInd Bank Ltd., Sberbank of Russia, Kapital Bank, National Bank of Fujairah (NBF), IndusInd Bank, Antwerp Diamond Bank & its parent company KBC Bank N.V.  Other International Diamond Banking Units will also eliminate or reduce Diamond Rough purchasing leverage in 2017 and/or require Manufacturers to secure Payment Insurance or provide 100% collateral.

Rough premiums on the Secondary Dealer Market held steady in the past few weeks as market sentiment improved following recent International Diamond Trade Shows. DTC boxes and ALROSA goods have been selling at an average 4.00% - 5.00% Premium on the Secondary Dealer Market. Diamond Rough prices have increased approximately 3.75% thus far in 2017.

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DIAMOND ROUGH PROCESSING SUMMARY

The price of a loose polished diamond has been directly proportional to its weight for hundreds of years. The common rule is that Diamond Rough loses approximately half or more of its original diamond rough carat weight undergoing cutting/polishing transformation into a loose polished diamond.

Diamond Rough

A Rough Diamond resembles an uninteresting piece of glass. Only after cutting/polishing and grinding the facets, will it unfurl its glory and glitter. A thorough study of the Diamond Rough is necessary to produce the best make/best carat weight with the least amount of impurities. Our world class artisans’ tremendous experience and accumulated generations of knowledge regarding Diamond Rough are critical at this stage of production.

Loose Polished Diamond(s)

The most common cut is the round brilliant. A typical round brilliant has 57 facets: table, 32 facets on the crown (the top part of a brilliant cut) and 24 facets on the pavilion (the lower part ending in a tip). It generally loses about half of its original weight through cutting/polishing. Other beautiful cuts are: marquise, emerald, asscher, cushion, oval, pear, heart, princess cut, triangle, octagon etc. The final shape of the polished diamond depends on internal characteristics of the Rough Diamond.

ROUGH DIAMOND PRODUCTION

…Marking…

Marking

First, our artisans analyze the Diamond Rough and determines how the diamond will be processed. The diamond is then marked, cut and polished. Each diamond is unique and the entire procedure is specific for each piece of Diamond Rough. The yield depends, above all, on the shape and quality of the underlying Diamond Rough.

...Cleaving…

Cleaving

Cleaving is a method of splitting the Diamond Rough in two or more parts with a single hit along the internal cleavable lines. Cleaving is always done parallel in the direction of the grain of the Diamond Rough crystal. The Diamond Rough is fastened in a wooden holder and opposite it, another holder clamps a second sharp diamond to make a slit into the stone. It is then split after hitting a steel cleaving tool with a hammer

...Sawing...

Sawing

Sawing is carried out against the direction of the Diamond Rough's crystal grain. The Diamond Rough is fastened to a copper head using a special mixture of gypsum and limestone. Once the mixture hardens, the head is clamped to the cutting machine. The Diamond Rough is sawn by an extremely thin disk which is covered by oil and diamond powder and reaches a rotation speed of between 15.000 and 17.000 rpm. The best rate of sawing is approximately 1 mm per hour.

... Bruiting...

Bruiting

A diamond gets its future shape via bruiting of cleaved or sawn Diamond Rough. The traditional method is again mounting the Diamond Rough to the head of a lathe. By means of another polished diamond mounted opposite it, bruiting is carried out whereby the Diamond Rough obtains its round brilliant shape.

...Cutting...

Cutting

Cutting is the process of creating facets on the Diamond Rough. The Diamond Rough is clamped into the special pliers of the cutting machine, called a quadrant, at a precisely adjusted angle against the cutting disk. The cutting disk is made of steel and it is covered with a mixture of oil and diamond powder.

Tradition & Technology

Tradition and TechnologyAlthough manual methods are still used, modern methods also play a very important role in our cutting/polishing facilities - a laser is used to mark the Diamond Rough before cleaving, sawing and shaping. It is not necessary to concentrate on the crystal growth lines when using a laser, but a diamond loses slightly more of its weight compared to older mechanical methods. In spite of the undeniable advantages of modern technology, our world class artisans’ skill plays an crucial role - which produces a fascinating cut/polished loose diamond. Several world class artisans always participate in the creation of one loose polished diamond. Usually one artisan makes the cutting design, another does the sawing, another bruiting and then at least two cutters follow: a so-called blocker and brillianter. Small diamonds, so called melées, are literally cut in bulk. We cut/polish to the highest specifications within the International Diamond Trade in our Israel, Hong Kong, Antwerp facilities.

If desired, our world class artisans can cut/polish acquired Diamond Rough to the highest specifications within the Trade to achieve maximum value from the corresponding Diamond Rough. We can then submit the completed loose polished diamond(s) to the International Diamond Grading Labs for Grading and prompt sale to our existing international Clientele of: Luxury Retailers, Wholesalers, Dealers, Jewelry Designers & Select Individuals.

Please do not hesitate to Contact Us via email for a timely personalized response to any submitted question, issue or concern. Certified Diamonds & Gemstones, Inc. additionally, welcomes the opportunity to provide a telephone and/or Skype consultation with its distinguished Clientele. To schedule a private telephone or Skype consultation at your convenience, please Contact Us on the link(s) set forth below.

Certified Diamonds & Gemstones, Inc. looks forward to meeting and exceeding the expectations of its Clientele.

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