Gem Pro Appraisal Services, LLC.

Croton-on-Hudson, New York, USA

Avg. Rating Rating star5.0 (8 reviews)

David Bidwell
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Gem Pro Appraisal Services is owned and managed by Graduate Gemologist David Bidwell, GG (GIA), SM (NAJA). This business provides a prompt and discrete appraisal service for jewelry, watches, pearls and also loose diamonds and colored gemstones.

Your Appraisal Appointment

This company regularly carries out appraisals in clients's homes in Croton-on-Hudson, White Plains, Chappaqua, Bedford, Yorktown Heights, Peekskill, New Rochelle and Greenwich CT.

The evaluation of your treasured items is normally carried out by appointment in your home or office, as David has a portable gem lab. Examination and valuation is performed in front of you... so your precious belongings never leave your sight. The consultation and the subsequent valuation documentation meets the rigorous standards set by the Uniform Standards of Professional Appraisal Practice (USPAP). Gem Pro reports are also available via selected jewelers and at various office locations in the Tri-State area.

This business does not buy, sell, or broker jewelry of any jewelry-related products, so you can be sure of an expert and totally unbiased, independent assessment of your valuables. Their appraisals and confidential consultations adhere to the highest standards in the industry and with over 25 years experience, Gem Pro Appraisal Services, LLC is committed to providing world class services with personal attention, sensitivity and confidentiality for their clients.

Your Appraiser

David has over twenty years of jewelry industry experience encompassing a diverse background including: Retail jewelry management and operations, gem and jewelry appraising, consulting, and gemological laboratory work.
David began his career in a family operated jewelry store where he spent many happy years advising clients in the purchase of custom design and estate jewelry, managed jewelry and watch repair services and conducted jewelry appraisal services. After earning the Graduate Gemologist Diploma (GG) and Insurance Replacement Appraisal Certificate from the Gemological Institute of America (GIA), David then moved on to the European Gemological Laboratory (EGL USA) in New York, serving as gemological and appraisal consultant from 2001 to 2008. He specialized in the appraisal of fancy color diamonds and rare unusual colored gemstones.

Now, David has established Gem Pro Appraisal Services, LLC an independent appraisal company, serving the needs of jewelry retailers, estate lawyers and consulting for some of the largest luxury online retailers in the United States. David has earned the title of Senior Member with the National Association of Jewelry Appraisers (NAJA) placing him among the top jewelry appraisal professionals in the United States.

Please use the contact links at the top of this page to book an appointment or make further enquiries


The Business

  • Private Practice & Trade Valuer
  • Business mix: 100% appraisals
  • Principal + 0 staff Appraisers
  • Mon - Thur: 9am to 6pm
  • Mobile lab, via jewelers & at Appraiser's office


  • Per-item & time-based fees
  • All major cards accepted
  • Full appraisal reports start at $150


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  • GG
  • SM (NAJA)


  • GIA Alumni


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While you wait jewelry appraisals


Gem Pro Appraisal Services, LLC.
Correspondence Address Only
420 S. Riverside Avenue. #169
NY 10520


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Reviews (8)
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All reviews have been verified. The Jewelry Appraiser has confirmed the validity of the report details provided by the Reviewer but did not see the Reviewers rating or review text during the validation process. This produces unbiased, reliable and genuine reviews.


avatarCody. Westchester

Review starsOct 2021

Great, Reliable Service!

David was not only extremely knowledgeable, but also provided kind and honest appraisal services. He worked around our schedule, was very responsive, and answered any and all questions about the appraised jewelry. We were more than happy with his services, and would 100% use him again. Highly recommend!

Expertise / Items Examined: Engagement ring.

avatarKM. Sleepy Hollow

Review starsJun 2021

Excellent Service

I needed an appraisal for an engagement ring to submit for insurance. David was extremely responsive. He was great at explaining the details of what goes into the diamond and answered all of our questions. All within an hour David examined the ring and printed and emailed the appraisal report.

Expertise / Items Examined: Diamond engagement ring.

avatarRoger in BC. Bedford Corners

Review starsApr 2021

Excellent, Knowledgeable Service

I came across a box of previously unknown jewelry from my mother and aunt. I was pleasantly surprised at the number of valuable pieces and their value.

David was outstanding. His attention to details and care with his work was demonstrated from the beginning, making sure that he confirmed and reconfirmed the time and location of the appraisal. By coming to look at the jewelry at my address, he made the entire process convenient. He gave me a preliminary appraisal before he left on the day of the appraisal. The final appraisal of most of the greater-valued items came quickly thereafter. The detail was specific and clear. The appraisal passed muster with State Farm without a hitch. He was not only thorough and timely, David was a delight to work with.

Expertise / Items Examined: A number of costume jewelry pieces (which David quickly identified), and several valuable pieces, including two Swiss gold-band watches, one diamond tennis bracelet, two diamond-drop earrings, a diamond gold ring, and one diamond cluster earring.

avatarDr Corn. Mount Vernon

Review starsOct 2020

Excellent Service

Mr. Bidwell is professional, thorough, and very pleasant. I love that he came to our location with all of his equipment and gave the appraisal immediately after his work was done.

He was also very willing to educate me on things I never knew about diamonds. This information will help me with future purchases. I recommend his services to all.

Expertise / Items Examined: My Diamond engagement ring.

avatarLiz M. Croton-on-Hudson

Review starsJuly 2020

Knowledgeable, Friendly Service in Challenging Time

Mr. Bidwell appraised over 20 pieces of women's jewelry as part of an estate valuation, during the height of COVID in our part of the country. He took great precautions to receive and return the jewelry while practicing social distancing and other safety measures. At the same time, he was quite helpful and solicitous, going over each piece in detail both in person and in his report, for example explaining why three seemingly identical jade necklaces had vastly different valuations, and differentiating original Art Deco pieces from modern reproductions. He was able to explain technical aspects of his analysis in an easy-to-understand manner, and it was a pleasure hearing him talk about each piece. Would highly recommend!

Expertise / Items Examined: A collection of antique and modern women's jewelry, including rings, necklaces, brooches and pins, and watches.

avatarKenneth G. Westbury NY

Review starsJun 2018

Super Accurate

David did an appraisal on a collection of gold jewelry that we had, recommending what we should auction, sell for scrap, or sell on our own. We finally took the scrap pieces to a deader and received $100 more than David's estimate. Right on the mark, can’t get too much closer than that.

avatarBassboyblue. Croton-on-Hudson

Review starsOct 2017

eBay Jewelry Reseller

David was referred to me by a local jeweler who spoke very highly of him. I retained his services to consult on jewelry I had for resale. David is extremely professional, he came in prepared and gave me information that I needed to accurately represent and sell the items I had. I have used him since and will do so again; I consider him a trusted and invaluable resource.

avatarSandra C. Wappinger Falls

Review starsFeb 2017

Appraisal of my engagement & Wedding Rings

I recently hired Mr. David Bidwell to appraise both my diamond engagement and wedding rings. I live in Dutchess County and because Mr. Bidwell is mobile he was able to meet me at my home in Dutchess County.

Before hiring Mr. Bidwell I had reached out to a well-known jeweler in my area. I did not feel comfortable with this other appraiser who owned the jewelry store as it seemed he was trying to talk me into selling my jewelry to buy one of his diamond pieces. Since Mr. Bidwell is an independent appraiser Mr. Bidwell has no affiliation with any jewelry store and is 100% unbiased and neutral. I would highly recommend Mr. Bidwell to appraise your jewelry.