Diamond Cut cut into consumer "meat" - Jewelry Industry
Diamond Cut cut into consumer "meat" - Jewelry Industry
Gemmological Association in Shanghai Jewelry Mr Cheung and other evaluation experts, has been jointly put on a letter to this newspaper, to expose some of the business by "the South African diamond," confuse the customer Zaike Mongolia trick, and now once again provides a simple "secret unique offerings," testing the formula in order to facilitate broad Consumers can evaluate their own sold Diamond Businesses are to reap "excessive profits" off Zaike Mongolia.
Play tricks on cut Known diamond trading Game Rules, that is internationally recognized weight, color, clarity and cut "4C" as standard, so the price has been relatively stable. Formal channels of the import of diamonds, should be charged 17% VAT, 5% higher Consumption Tax , And a lot of marketing expenses, net profit for a very limited retail. Moreover Diamond Sell Comes with an identification certificate, the buyer can check the data marked "really want to reap huge profits, are cut the 'C' on the tricks as much!"
Where 1 carat diamond processing generally requires 3 to 4 carats of rough diamonds in order to achieve diameter of 6.40 ~ 6.50mm, height 3.96 ~ 3.98mm in the internationally accepted "standard cut", some profit-making companies in order to save processing costs excessive profits, often cut corners, do not meet the processing size of some rough diamonds makeshift processing (jargon, said Paul component), generally only 2-carat rough diamond can "will" a 1 carat diamond of the finished product.
Fat or thin are suspicious Would eventually have to give himself away, as the internationally recognized standard cut, finished drilling on the optical point of view of each other have strict rules, cutting corners simply is not a diameter that is high on the "shrink", it is bound to change the angle of optical , overall shape?? thinner was "chimney"-like; or change squat into a "bucket back" or " Basin Cap "shape.
Course, the majority of buyers, in layman terms, all this is not only very professional, the naked eye can not perceive, but the experts to provide test formula will help you perspicacious.
Formula in searching for answers Diamond nominal calculated as follows: diameter of cubic 0.00366 ( 0.03 carat allowed error)
With calculator, consumers can own hopes of finding answers. For example:
A nominal 1-carat diamond, identification of the diameter of the book is written 6.4mm (even if the seller is not interested in standard, she also can use the cursor cards measure out), apply the formula is:
6.4 6.4 6.4 0.00366 = 0.96 (kt)
And 1 carat of error of 1-0.96 = 0.04, that is also close to the basic allowable error of plus or minus 0.03. If the identification of the book marked
diameter is 6.22mm, the result of formula is 0.88 kt 1-.88 = 0.12, and 0.03 compared to allow the addition and subtraction, "Quejinduanliang" on the big. No doubt that Fengyun nominal 1 carat diamond, certainly tricky, and goods prices are not really false. Large In Small
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