Deleuse New and Vintage Fine Jewelry

Deleuse Fine Jewelry

            Jeff Deleuse, Graduate Gemologist and Certified Appraiser  from the Gemological Institute of America
  • Specialist in Diamond Grading and Evaluation and Gemstone Identification degrees from the Gemological Institute.
  • Jeff Deleuse has the education and over forty years of experience in diamond and jewelry appraisals for insurance and estate purposes. 
  • Gemological instruments on premises:
  • Metal testing, Microscope, Gem Refractometer, Diamond Tester, Gem Polariscope and Scale.
  • Jeff will guide you through the process of buying diamonds. Trustworthy and honesty has been our family business ethics since 1945.

Graduate from the Gemological Institute of America and members of the American Gem Society and the American Gem Trade Association (2008-2023 past members), Jeff Deleuse will personally conduct all research for a comprehensive and detailed analysis of your fine jewelry.

  • With a complete Gem Lab in our store, all jewelry is fully insured and remains on our premises.
  • Same day service on single items and prompt completion of larger collections within a few days are available with appointments.
  • Estate appraisals for tax purposes are available with accompanying photographs on request. 
  • Verbal consultations are also available by appointment.

                  All jewelry is fully insured and remains in our store.  

Please call for more information and for appointments.   415-459-3739

deleuse@deleusejewelers.com.            deleusejewelers@gmail.com

Jeff Deleuse

  • B.A. Psychology
  • Advanced French Language, University of Nice, France
  • Stanford Continuing Studies
  • Graduate Gemologist, Certified Appraiser 

Janet Deleuse

  • B.S.  Molecular Biology
  •  Stanford Continuing Studies, Art History and Literature
  • Saul Bell International Jewelry Award Judge, 2015
  • Past Board Marin Advocates for Children, 2014
  • Contributing Writer and Featured Designer in Jane Merrill's book"I Love Those Earrings" 2014
  • Audio Contributor to “Cartier & America” Exhibit at the Legion of Honor, San Francisco, 2010-2011
  • Janet Deleuse Couture Featured in Britex  Newsletter, San Francisco, 2012
  • "Fashion & Impressionism" research paper written in Spring 2011; for exhibit
  • Cartier Achievement Award presented June 2009
  • Women's Jewelry Association Award January 2009
  • Contributing Writer for LUXX International Jewelry Magazine, 2009-2010

 Affiliations:

  • Graduate Gemologists
  • Past Members of the American Gem Trade Association, 2008-2023
  • Past Members American Gem Society, 2008-2023
  • Jewelers Of America
  • Women's Jewelry Association
  • Contemporary Jewelers Design Group

                        

 

 

     

Published: Tue, Mar 19, 2024

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“Janet, thank-you for everything you do. As I said before, you are truly an artist, and that is why it is so special buying jewelry from you.” Peter, Atlanta, GA

” Beauty, exquisite design, pleasant and personalized attention. These qualities have been constant in our 20 years of shopping with Janet and Jeff Deleuse – Two exceptionally talented and caring people. The Best!’ Helen P.,Belvedere

"This store has a very pleasant environment and Jeff and Janet are both kind, wonderful people. I used Jeff a few times for appraisals and he was very thorough and was happy to answer lots of questions. He uses scientific methods and tests rather than going solely by appearance as some jewelers will try to do, and his expertise is well respected. On one occasion, he even went out of his way to help expedite a deal for me. He has my highest recommendation. Suzanne T., San Rafael, CA

“Jeff is an incredible gemologist who knows everything there is to know about gem stones. He is a true professional and can be trusted. The quality of their work is impeccible and always consistent. I would recommend Deleuse Jewelers to anyone looking for a new, “bauble,” for themselves or someone special!” Terri B., Ross

"I have used Deleuse Jewelers for many years - for everything from purchasing jewelry to repairing jewelry to getting appraisals on jewelry. Their service and work is superb. I highly recommend them." Suzanne S., Tiburon, CA

"I purchased this beautiful chain from Janet Deleuse about 3 weeks ago. It was an online purchase so I was hoping I would be pleased. It exceeded my expectations as it was exactly as pictured. Delicate and perfectly crafted. Packing was very secure and shipping was quick. I would not hesitate to purchase from Deleuse again! Michele, New Jersey

“Janet and Jeff designed and crafted our wedding rings and did a great job. They worked with existing diamonds we had in an antique ruby cocktail ring, added the sapphire stone and made a beautiful pendant with the ruby. In addition, they designed earrings for our daughters. All are still in great shape today. They are easy to work with and very reliable and trustworthy.” Peg M., San Anselmo

Accreditation includes diplomas from the Gemological Institute of America and the American Gem Society and thirty years of experience.

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