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Diamond Grading - The Gia Clarity Grading System
Richard T.Liddicoat proposed and developed the GIA clarity grading system in 1952. He was the president of GIA at that time. It took lot of effort and dedication to start this new system. He got tremendous support from Lester Bensen, joe Phillips, Robert Crowningshield and Bert Krashes.
The system was developed for assessment of the clarity of the diamonds used in jewelry. While in the progress of development the clarity grading system was called 'diamond grading and evaluation appraisal'. The key aspects of the grading system were - color, clarity and make (quality of the cut, polish and finish).
Even though there were some other grading systems available for diamonds, there was no single system that was used as a standard across traders. Some of the classifications that were used before the formal development of the GIA clarity grading system were terms like Flawless, VVS, VS, SI and I.
But these terms of classifying diamonds were not very accurate and therefore was very arduous to use it practically in the trade.
In the early 1953, after the completion of the GIA clarity grading system, it was formally announced and made public.This initial system had nine grades and these included - Flawless, VVS1, VVS2, VS1, VS2, SI1, SI2, I1 and I2. The 'I' stood for Imperfect and was exactly the opposite of the Flawless diamond.
Though this new system of grading had been contributed to the industry, there was the need to popularise it. It required lot of practice and training to incorporated it fully into the trade.
In april 1953, Soon after revealing the GIA clarity grading sytem, the first diamond grading class was started by Liddicoat and Robert Crowningshield. The place of this first distinguished course was New York. With a modest beginning that attracted only about 11 students from Massachusetts and Pennsylvania, GIA clarity grading courses are held in various cities and this learning is disseminated using various teaching methods like distance education, traveling extension classes and probably webex too.
The system developed in 1953 underwent its first change only in 1970 when the IF grade was added to the already present nine grades. This was done because Liddicoat realized that many diamonds were re polished to get the Flawless certificate, compromising on the symmetry and the proportions. (IF grade means Internally Flawless where the diamond can have some blemishes from outside but has to be flawless internally.)
Minor changes have been made to the system since then but the GIA Clarity Grading System was the first attempt to professionalize any kind of diamond clarity grading system. The efforts by Liddicoat and team have led to a more objective classification of the diamonds that are traded today and therefore made the industry more structured.
Reference : GIA Study Material ( Graduate Gemologist )
About the Author
Mithun Rao, a jewelry professional, holds degree in gemology and jewelry design from Mumbai and has spent 10 years in the jewelry industry. He owns and manages the site giving information on natural gemstones and diamond information.
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Does this prove that Pennsylvania supporters want Obama?
Shivering in blankets of Penn State's colors, some 20,000 people filled a campus lawn Sunday to hear Barack Obama say he can win the Democratic nomination even if rival Hillary Rodham Clinton stays in the race.
Supporters stood in long lines for hours to hear Obama ahead of the April 22 Pennsylvania primary.
On a sunny day with temperatures in the low 40's, most bundled up for the type of large-scale rally that has become the candidate's trademark.
I predict people will just say something about ignorant college kids...go Obama