Appraising Gems and Jewelry
Appraising Gems and Jewelry

Professional Gemologist Certification Course

Appraising Gems and Jewelry

Types of Appraisals

Four basic types of appraisals yield four different kinds of value.

  • Replacement Value
  • Fair Market Value
  • Wholesale Value
  • Liquidation or Scrap Value

The first two values are retail amounts. The latter two are variations of wholesale rates. You'll almost always do replacement value appraisals for gem and jewelry owners and consumers. You'll likely conduct wholesale appraisals, too. These are done in a similar manner. Of course, in these cases you're researching the prices a jeweler would expect to pay.

Occasionally, your customers may ask you to value a lot. If the lot is too large to examine every piece, take a sample large enough to show every variation in size and quality. Then, multiply the sample's value by the total size of the lot. For example, if you looked at 20% of the stones as your sample, multiply your results by five.

Appraising Gems for Specialized Markets

Conducting appraisals involves researching recent sales of like items for comparison. Thus, appraising gems and jewelry like diamond earrings can be fairly simple. However, you'll also encounter more difficult objects.

Uncommon Gems

Let's say your customer wants an appraisal for a...


Donald Clark, CSM IMG

The late Donald Clark, CSM founded the International Gem Society in 1998. Donald started in the gem and jewelry industry in 1976. He received his formal gemology training from the Gemological Institute of America (GIA) and the American Society of Gemcutters (ASG). The letters “CSM” after his name stood for Certified Supreme Master Gemcutter, a designation of Wykoff’s ASG which has often been referred to as the doctorate of gem cutting. The American Society of Gemcutters only had 54 people reach this level. Along with dozens of articles for leading trade magazines, Donald authored the book “Modern Faceting, the Easy Way.”


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