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Insurance Appraisal

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.

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Estate Appraisal

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.

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Collateral Appraisal

NGL’s Collateral Appraisal service offers many solutions to small, medium , and large size jewelry companies. Whether it’s a simple inventory analysis, or a more complex audit situation, NGL can guide your company through this critical process.

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Expert Witness

Nidiffer Gem Laboratory has extensive experience providing deposition and Expert Witness services. Expert Witness and Consultation assignments are charged on an hourly basis.

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Estate Brokerage

Nidiffer Gem Laboratory operates and oversees a dedicated Estate Jewelry brokerage company to help clients buy and sell estate jewelry. Please contact us at any time with any questions about our estate jewelry brokerage service.

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Jewelry Liquidation

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.

Reasons for an Appraisal

Reasons for an Appraisal

There are many reasons for having your jewelry appraised. Most jewelry appraisals are done for insurance purposes, and it is important to make sure you are insuring your jewelry for the correct value. Many of NGL’s customers request either an

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About Nidiffer Gem Laboratory LLC

About NGL

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

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