What is the lab?
Gemological Laboratory is engaged in testing and ranking of diamonds, gemstones and jewelry by using optical equipment, electro-optical and scientific equipment, innovative analytical. Gemological Laboratory serves the manufacturers and dealers in diamonds, gems and jewelry, the store owners and the general public, while providing professional information about the stones.
The role of Hmabdalzhut and rate this gemstone objectively as large as possible in response to the rules of the International Council for diamonds. Gemological Laboratory must maintain a professional, be impartial and maintain the rules of proper disclosure and high professionalism.
World Federation of Diamond Bourses and the International Association of Diamond Manufacturers Association. Decided to establish a joint committee, called later called the International Council for diamonds. In order to establish international standards and to push to unify Terms Gmologyim
International Council rules require the Diamond Gemological Laboratory work under international criteria and in accordance with the disclosure.
The - GIA (Gemological Institute of America) has laid the foundations that have made it over the years the flagship of the World Gemological Laboratory. The GIA has become a byword in diamonds which the world''s leading laboratory and accepted all the world''s diamond bourses.
Gemological certificate is essentially based on four criteria that determine the value of a diamond, CS4: weight, cleanliness, quality paint job.
Weight (Carat) - the basic unit for weighing diamonds is Hackert.
1 carat = 0.2 grams = 100 points (example: 5 carats = 1 gram).
Cleaning (Clarity) - SEDIMENT illustrates how loose diamond defects when it is viewed at a magnification of X10.
By GIA clarity grades are 11 on 6 categories: FL - Flawless (internal or external), IF - Internally Flawless, VVS2, VVS1 - very, very easy to fault, VS2, VS1 - very easy defect, SI2, SI1 - slight defect, I3, I2, I1 - corrupted.
SEDIMENT reflects the existing defects diamond into account quantity, their type, location, color and how their vision and their impact on the stone.
Trading is another level of cleanliness - SI3, which is not recognized by the GIA.
Color (Color) - describes the degree of color deficiency point to the yellow domain.
Diamond''s color is due to swallowing a stone beams due to the presence of foreign atoms or structural disorders. Gemological Laboratory driven several methods to rank the usual color group.
The most common grading system currently is the method of the GIA, the GIA, which provides a signal to the degree of color, beginning with the letter D, which symbolizes the lack of color, to the letter Z, which stands for the yellow.
Processing quality (Cut) - refers to the processing quality of proportions (Proportion), the level of finish (Finish) and their impact on the appearance of stone. Ideal proportions are the best angle of refraction and return the round stone beams. These proportions are known today as - the ideal cutting or polishing Excellent.
Quality of polish (Polish) - refers to the lack of scratches, abrasions or burned surfaces.
Nature of the symmetry, the level of polish and proportions determine the degree of reflection, which give a diamond its brilliance and its special beauty. Currently accepted quality rankings diamond processing are: Poor, Fair, Good, Very Good, Excellent. Gemological Laboratory gemological certificate must indicate whether they found the stones underwent treatment. GIA laser inscribed on the works handling the diamond belt, even without asking for permission to the owner of the stone. This is an excellent opportunity to reiterate the diamond treatment disclosure is mandatory throughout the marketing chain. American Gemological Laboratory - the GIA - recently announced that will end the contracts with customers found that do not meet the duty of disclosure.
You can usually find a gemological certificate drawings - to indicate the location of defects in diamond and drafting side describes the proportions and symmetry.
You can publish a report identifying or rating / certificate synthetic diamond. But remove the classified report / certificate of synthetic diamond color printed cover binding of distinct color rating reports / certificates, diamond or natural diamond. The cover must appear the words: Created in the laboratory / lab size / manmade / synthetic. Laboratory-grown, laboratory-created, man-made, synthetic.
The lab did not specify its gemological certificate the price of the stone.
Customary gemological laboratories do not wage estimates for setting the price for a conflict of interest between science and value for money. However, the effect of laboratory on the rate decisions of the diamond or gemstone is enormous. Any difference, even the slightest, the lab''s rating decisions, affects the price of a diamond.
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