Most people have both jewelry lab certificates and appraisals for their valuable jewelry, but the two documents are not one in the same. They serve different purposes and contain a different set of information that is helpful to jewelry owners, as well as to people who are looking for new jewelry to purchase.
Jewelry lab certificates and appraisals often go hand in hand, but the lab certificate is a document that describes information about an unmounted gem stone, like a diamond that has not been set into any piece of jewelry, while the appraisal provides detailed information on the market value of a piece of jewelry, whether it is unmounted or already set as a ring, earrings, or necklace for example.
When selecting jewelry lab certificates and appraisals on jewelry that you are considering to purchase, it is best to select an independent company that provides these documents rather than rely on the documents created by the company that you are planning to buy your jewelry from. Otherwise, you face the potential for the lab or appraiser to be biased, since they will benefit from the sale of jewelry.
If you already have jewelry lab certificates and appraisals on your existing jewelry, but are unsure of their accuracy, it may be worthwhile to have your items appraised again to see what their current market value is.
Jewelry lab certificates are written reports that detail unmounted gemstones rather than completed pieces of jewelry. The certificates include information about the diamonds (or other gemstone) cut and shape, as well as the stone's color and clarity grades as decided by the Gemological Institute of America (GIA). Lab certificates contain specifics about the carat weight as well as the dimensions of the diamond, taking into account the stone's angles.
Once the lab certificate is drawn up, it should not change unless the stone is physically altered or it is found at a later date that the gem stone was evaluated incorrectly the first time.
