Amethyst Stone


Deborah Villepigue, GIA-GG, RMV, AGA, APPA, CGA, AGS-ICGA, owner of The Jewelry Appraiser, Inc. is a diversely experienced jewelry appraiser, as well as former designer and manufacturer, offering personal, professional, and forensic valuation of a variety of assets. The Jewelry Appraiser, Inc. is a fully certified independent gemology lab delivering expert appraisals, color grading and confirming GIA certifications.


Are you shopping for high-end jewelry in New York? Our Manhasset location serves all of Long Island as well as the entire New York City metropolitan area. Before you buy, get an appraisal to make sure you know what you are buying. Deborah A. Villepigue GIA-GG, RMV, AGA, APPA, CGA, AGS-ICGA has assisted judges, celebrities, collectors and individuals in their diamond, jewel and gemological valuation needs. Whether you need an appraisal for insurance purposes, need help with the valuation of an estate or want to determine the true value of your jewelry, we will make the process simple for you.


The Jewelry Appraiser, Inc. appraisals are accepted by all courts, the US Government, the IRS, US Customs, Law Enforcement Agencies, major insurance companies, as well as by jewelers, auction houses nationwide and other businesses. Our appraisals are used to determine the identification and value for all jewelry (estate and modern) and metals (precious and base). Appraisal data files are maintained for a period of seven years. Our extensive library includes authoritative appraisal manuals and past and current price indexes, as well as reference books and trade periodicals.


Deborah A. Villepigue GIA-GG, RMV, AGA, APPA, CGA, AGS-ICGA is a member of the Jewelers Vigilance Committee (JVC), which helps to maintain honesty and integrity in the jewelry industry. We have a great passion for upholding the law in this industry. Various courts throughout New York have retained The Jewelry Appraiser Inc., on numerous occasions for expert witness testimony. Additionally, we work with district attorneys on the forensics of jewelry for the purpose of determining value for prosecution or defense, criminal matters and civil matters, such as state and federal inheritance tax basis.


When you work with us, you can expect more than just discerning the value of an asset. Our method of appraising exceeds industry standards and our passion to deliver white glove service is obvious.

The credentials of Deborah Villepigue include a Master Graduate Jeweler degree, which affords her the wisdom to know precisely what goes into making a particular piece of jewelry. She is quite capable of evaluating the jewelry’s workmanship, ensuring that your piece has been properly crafted and is suitable to wear. Our aim is to give you an appraisal you’re confident with.

An appraisal done by someone without the proper training will very often be misinformed, affecting many situations, such as the return policy, a limited warranty, the value of an heirloom, insurance coverage, etc. Most insurance companies will not cover the workmanship that goes into making a piece of jewelry. The qualified appraiser’s ability to know precisely whether a particular piece is or isn’t made correctly can mean the difference between feeling 100% secure or 100% sorry. 

Without a proper evaluation, a consumer may never be able to recover a substantial loss. The Jewelry Appraiser, Inc’s facility contains only the most modern on-site and mobile laboratories for inspection, identification or analysis of diamonds, colored gems, metals and fine jewelry.

The Jewelry Appraiser, Inc. utilizes a wide array of gemological trade supplies and industry research to conduct appraisals. Constantly pursuing additional education through the industry’s most respected organizations, Deborah Villepigue,  uses the most current tools and technologies available. 

We work hard to ensure our expertise and passion remain at the top of our profession, involving great persistence and dedication, which has led us to become widely recognized as a leader in this field. Our competencies include conducting research with in-house reference tools, including the industry’s latest reference library, marketing, evaluating pricing and consumer trends for diamonds, colored gemstones, precious metals and fine jewelry, and more. 

All appraisals and services rendered by Deborah Villepigue and The Jewelry Appraiser, Inc., are governed by the industry’s leading recognized diamond grading system of the Gemological Institute of America (GIA), the Code of Ethics of The National Association of Jewelry Appraisers (NAJA), the Uniform Standards of Professional Appraisal Practices (USPAP) and The American Society Of Appraisers (ASA).


Learn more about our services below or check out what sets The Jewelry Appraiser, Inc. apart here and view the full experience of Deborah Villepigue, GIA-GG, RMV, AGA, APPA, CGA, AGS-ICGA.

Get In Touch

For a faster response, please reach us by phone at 516-365-0888 or on WhatsApp at 516-413-4502. Otherwise, we’ll get back to you within 24 to 72 hours. Thank you!