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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.
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About NGL
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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 Appraisal
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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.
Estate Appraisal
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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.
Collateral Appraisal
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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.
Jewelry Liquidation
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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.
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