About Us


                                            Inside our Tiburon, California location

The Janet Deleuse Fine Jewelry and Couture  is an online boutique featuring fine jewelry and luxury accessories designed by Janet Deleuse and Lazare Kaplan Ideal Cut Diamonds, Assael International Fine Pearls and CASATO Fine Jewelry.    Welcome

The jewelry and couture on this site represents the hard work and love of design by Janet Deleuse.  Most of the items are one of a kind pieces.   All items are made in the U.S.A. by professionals in our industry.  ALL diamonds sold from Deleuse Jewelers in Tiburon are ethically sourced and 100% conflict-free from Kimberley certified diamond dealers. The gems used in our jewelry are also sourced from our industry wholesalers exclusively by the AGTA & AGS. We are members of the AGTA, AGS and GIA Certified Gemologist.

All gold used for manufacturing is purchased from our local refinery and 100% recycled. This has been our policy for 30 years.

Did you know that Deleuse Jewelers was established in 1982 with a policy of recycling, ethical sourcing and safe work environment?  Questions regarding the cleaning and care of your jewelry?  We are here to answer: call us:  1-415-435-2484  

READ: Diamond Brokering Services,  Jeff Deleuse, Buying A Diamond    GIA Diamond Buying Guide     What is Gold?    What is Platinum?   About Pearls   Charity, GREY2K USA

Janet Deleuse, who is owner of Deleuse Jewelers with her husband Jeff, is an established jewelry and clothing designer.  Our brick and mortar location Deleuse Jewelers has been a family owned and operated business for over 60 years.  read more...

We are located by the San Francisco Bay in with a spectacular view of the city skyline. For more information please contact us:  

 tel: 415-435-2484 email: deleuse@deleusejewelers.com   webdeleusejewelers.com   Facebook:  deleuse.com  

Instagram:  Janetdeleuse    Twitter: janetdeleuse@deleusejewelers     Janet's Blog: janetdeleuse.com

Affiliations: Graduate Gemologists, Members of the American Gem Trade Association and the American Gem Society, Jewelers Of America, Contemporary Jewelry Design Group, Women's Jewelry Association

Jeff Deleuse, Diamond Brokerage Service, read


Janet Deleuse, B.S. Molecular Biology, Stanford Continuing Studies

  • 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
  • Contributor to “Cartier & America” Exhibit at the Legion of Honor, San Francisco, 2010-2011
  • Janet Deleuse Label Couture Featured in Britex Fabrics Newsletter, San Francisco, 2012
  • "Fashion & Impressionism"  research paper written in Spring 2011
  • Cartier Achievement Award presented June 2009
  • Women's Jewelry Association Award January 2009
  • Contributing Writer for LUXX International Jewelry Magazine, 2009-2010
Please review our return policy before ordering, for more questions or detailed information please call or email.

              Jeff Deleuse, Certified Appraiser, Graduate Gemologist              


Fine Jewelry Designer Janet Deleuse began working in the family jewelry business following her marriage to gemologist Jeff Deleuse. She put a degree in molecular biology aside to embrace her true passion for art and design, which she had cultivated since childhood.

By 1982, her love of the hand processes in creating artwork had blossomed into designing magnificent, one-of-a-kind statement jewelry—earrings, bracelets, necklaces, rings—that have been featured in WWD, Town & Country, The Robb Report and Lustre Magazines, among others.

The designer's exclusive hand fabricated pieces are widely recognized for classic lines and fine quality gems, including pearls and flawless WS, VS and EF diamonds set in 18k gold or platinum, as well a penchant for monochromatic styling—"I like clean lines, says Deleuse, even if the design is intricate."

In addition, the designer has recently expanded into couture outerwear and accessories with a collection of pearl evening bags, pearl belts, silk scarves and couture outerwear, all handcrafted in the San Francisco Bay area and offered under the Janet Deleuse label.

Family owned and operated Deleuse Jewelers was established in 1934 by John Deleuse, a master watchmaker and graduate of the Ecole Nationale d'Horologie de Cluses. In 1945, he opened the first family-owned and operated boutique in his hometown of Nice, France.

Janet and Jeff Deleuse opened Deleuse Jewelers in Tiburon, California in 1982, and continue the brand's mission to offer the most uniquely elegant jewelry, using the worlds finest gems and employing the highest quality craftsmanship.

Janet Deleuse is an accepted member of the Contemporary Jewelry Design Group, a national organization dedicated to the promotion of creative jewelry design and committed to the highest standards of integrity and ethics in business and design. She is the owner of Deleuse Jewelers in Tiburon, California.


                     The front steps of our store with Joni (our dog) watching the sun go down on the city skyline.

"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.

 "Janet & Jeff designed our wedding rings 5 years ago and I went back to them for another ring for my wife. Excellent design and excellent quality diamonds and aqua marine. They spent a lot of time working with us on the design, selection of the diamond and aqua marine. Worth every penny!" Shawn S., Tiburon, CA

Janet Deleuse Design Ruby and Diamond Wedding Set, Excellent decision
★ ★ ★ ★ ★
"The decision to purchase took about five mins but the rewards will last a lifetime. The ruby is a perfect size, shape, setting and design and my fiancé loves your work."  
David J.

”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

Italian Gold Earrings, Beautiful earrings easily purchased
★ ★ ★ ★ ★
"I/ we have bought many one of a kind,beautiful jewelry from Deleuse and I trust them implicently..so in buying online I knew that I would be very happy with my purchase..I have been looking for a long time for these and now I have them!! " 
Kris C.


“Thank you for your exquisite selection. Your store is beautiful and what fun to end my visit with so many jewels!” Liz F., Corte Madera

“Deleuse Jewelers in Tiburon sells exceptional jewelry of high quality and unique design. Co-owner Janet Deleuse designs many of the stunning pieces working with each stone’s character to match it to a complementary setting.  If you are looking for a memorable piece of jewelry, Deleuse Jewelers is the place to go!” Maureen B., San Francisco

“My husband and I have been customers of Deleuse Jewelers for more than 10 years and we have purchased many beautiful and personalized designs.  Janet’s and Jeff’s creations are exceptional.” Diana S., Tiburon, Marin

“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

“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 Jewlers to anyone looking for a new, “bauble,” for themselves or someone special!” Terri B., Ross

“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


The waterfront view of our Tiburon, California location

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