Can You Justify That High Diamond Grade?

If after a sale a diamond is found to have a color or clarity grade that differs from the way the seller represented it, the dollars at stake can be substantial. The grading process is subjective, so a discrepancy in grades from two different appraisers might be expected. But such a variance can take a toll on your profits—and on your reputation. The industry allows a certain tolerance for error. For example, in color and clarity grading, the accepted margin of error is one grade. But this can mean a tremendous difference in price—and the difference is magnified if the diamond in question is large. In a 2-ct. round diamond with VS1 clarity, the difference in price between G color and H color is $1,400 wholesale ($700 per carat). For 3-ct. stones with the same grade difference, the price differential is $3,900 wholesale ($1,300 per carat). If you sell a diamond as a G VS1, what ha

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