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What should the diamond buyer beware?

April 26, 2017Beware buyer diamond

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What should the diamond buyer beware?

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(1) The width of the EX grade, (2) abundant steep/deep combinations. Also, be aware of the ‘rounding’ that occurs on GIA diamond grading reports; the angles you see are not reported to the tenth of a degree like AGS reports or Sarin/Helium scans. There are other issues, but these are the main ones to look out for when considering a GIA ‘EX.’ EXAMPLES I. GIA EX GRADE IS VAST, MANY WILL BE EQUIVALENT TO AGS4 Using the proven AGS 11-level system for comparison, GIA’s top grade is extremely wide. Alone, it spans the top 5 AGS grades. A diamond graded GIA Excellent may be an AGS4 as easily as an AGS0. Further, each lower AGS grade leads to extra weight within the same GIA grade. Mass manufacturers will cut the heaviest possible GIA Excellent. This means when a consumer is buying a GIA Excellent the statistical chance of him buying an AGS4 will be high. GIA may tell you that within their top grade there is no visible difference but AGS will tell you it can be divided into 5 different grades.