Nidiffer Laurie Gemologist Jewelry Appraiser
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In order to protect your fine jewelry investment beyond one or two thousand dollars, most insurance companies require an additional rider on your existing policy. These riders require an independent Insurance Appraisal from a Graduate Gemologist. Estate Jewelry can be very complex in its intrinsic value.

An Estate piece of jewelry can be valued as an antique, or according to who designed and made the piece. A Faberge Egg, or a Vintage design from Cartier may have value beyond its material content. NGL's Collateral Appraisal service offers many solutions to small, medium, and large size jewelry companies.
Services
Nidiffer Gem Laboratory LLC (NGL) is owned and operated by Ms. Laurie Nidiffer. Established in 1986, Nidiffer Gem Laboratory was soon recognized as the preferred gemological services company in the Midwestern United States. Ms. Nidiffer's attention to detail and uncompromising ethics have earned NGL a distinctive place in the gem and jewelry industry.
Insurance Appraisals are generally done to document your fine jewelry in the event it is lost, stolen, or possibly destroyed due to a fire. If you have homeowner's insurance, or renters insurance, it may include some coverage for "unscheduled" property including jewelry. Generally, "unscheduled" coverage would cover you if your jewelry is stolen or destroyed in a fire.
If you have an old or unique piece of fine jewelry, you may want to get an appraisal to learn about the history of that type of jewelry and its value. This is often described as an Estate Appraisal, which assigns value to a piece of jewelry that is more in line with current pricing conditions and liquidity potential.
Nidiffer Gem Laboratory's comprehensive Collateral Appraisal service offers many solutions to small, medium, and large size jewelry companies. Our staff will conduct all service at your facility, which allows you to monitor and manage all aspects of the process. Whether it's a simple inventory analysis, or a more complex audit situation, NGL can guide your company through this critical process with confidence.
Liquidation appraisal value is value determined when an owner decides to convert jewelry items into immediate cash. The sale can be held under forced or limiting conditions and when there are time constraints, such as under court order or bankruptcy. Liquidation is the lowest measurable market, and results in the lowest net return to the client.
Reviews (2)
Connie Smither
Connie Smither
Dec 16, 2020
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Laurie "lost" my grandmothers wedding ring after I trusted her with information about the history of the ring. She did offer to pay for it but...no, I want my family heirloom back. It's been 8 months and she still hasn't been able to find the ring. She did a good job with cleaning and repair of other jewelry but I certainly would ever leave something irreplaceable with her again.
Sharon Rico
Sharon Rico
Jun 02, 2017
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I went to 3 appraisers today and Nidiffer Gem Lab was by far superior in every way. They are courteous, knowledgeable and fair. I highly recommend them.