Jewelry, Timepieces & Luxury Accessories Consignment Directors

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Kathleen Guzman
Managing Director, New York
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1-877-HERITAGE (437-4824)   Ext.1672
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Kathleen Guzman is a recognized appraiser and auctioneer with over thirty years experience in the art and antiques industry. Ms. Guzman is the Managing Director of Heritage Auctions in New York, the third largest auction house based in Dallas. She has personally auctioned over 1,500 sales with over $1 Million objects valued at over $1 Billion US dollars. She brings 15 years experience from the world-renown international auction house Christie’s, selling such items as a Monet watercolor for $4.3 Million and the Ruby Slippers from the Wizard of Oz for $660,000. She was the former President of Christie’s East and President of Phillips Auctioneers, as well as Senior Vice-President of Business Development at Ebay.

Ms. Guzman is frequently quoted in print, radio and has been seen on television regarding the art and antiques market and spokesperson for the art market on such shows as Oprah, Good Morning America, Today, CNN and Sally Jessy Raphael. She appears as an expert on the PBS series “Antiques Roadshow” for the past seventeen years, as on-air host for Good Life TV, host at QVC, and frequent guest for the Treasure channel satellite cable station in, “Treasure Seekers” and Metro TV’s “Antique Show and Sell”. She also has co-starred for the pilot TV show “For What It’s Worth” with Robin Leach and is a contributing editor to the Miller’s Antique Collector’s Books writing articles recently. She was the Director of Hubert Gallery, specializing in Henri Matisse and Pablo Picasso for two years, and is professionally, an independent consultant, a USPAP certified art appraiser, writer and charity auctioneer.

She holds an Executive M.B.A. from Columbia University and has a Master’s Degree in Art History from Queen’s College. Ms. Guzman lectures extensively on the art market for the American Appraiser’s Association, New York University, Bard College and the Fashion Institute of Technology. Ms. Guzman also auctions extensively for charitable causes including Make-a-Wish, Juvenile Diabetes and Housing Works to name a few, with noted celebrities. Her present and past clients include Bloomberg, Inc, the Estate of Marilyn Monroe, Barbra Streisand, the estate of Tom Thumb and the artist John Graham.

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Jill Burgum
Senior Director, Fine Jewelry, Dallas
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1-877-HERITAGE (437-4824)   Ext.1697
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Jill Burgum, Senior Director of Fine Jewelry for Heritage Auctions, brings a wealth of jewelry expertise to the company.

A graduate of University of Hawaii at Manoa, Ms. Burgum received her B.A. in Art History. After completing her degree, she attended Bowman Tech and Stewart's International, both for training in jewelry manufacturing and repair, then the Gemological Institute of America in Santa Monica, California, where she completed degrees in both Graduate Gemology and Jewelry Design in 1994.

Ms. Burgum began her working career as an on-call preview worker for Sotheby's Beverly Hills, California. She then moved to San Francisco as a jewelry cataloguer for Butterfield & Butterfield Auctions in 1996, transferring to their Los Angeles Jewelry department in 1997 as lead specialist, which she eventually left to build two jewelry web sites for start-up companies. She has also worked in retail jewelry sales and owned her own independent jewelry appraisal business.

She has been a contributor to Art + Auction, Brilliant, Eclat, Modern Jeweler, MSN Money, and Rapaport magazines.

Ms. Burgum has been a guest lecturer for the Los Angeles Natural History Museum, Gem & Mineral Council, and appeared as a specialist on HGTV, KTLA, CNN, FOX Business and ANTIQUES ROADSHOW.

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Jim Wolf
Director of Watches & Fine Timepieces
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1-877-HERITAGE (437-4824)   Ext.1659
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Jim Wolf began his horological career in 1980 as an apprentice watchmaker and cataloger for Ashland Investments. He quickly became a key executive in charge of sales and acquisitions and developed an industry leading catalog series presenting fine antique pocket watches, vintage wristwatches and estate jewelry. As a dealer and advisor to watch collectors worldwide, Jim has provided expert consultation concerning values, authenticity, and investment potential. Jim is also highly respected by collectors for his through knowledge of the historical, technical and aesthetic aspects of watches. Mr. Wolf has been a member of the National Association of Watch and Clock Collectors since 1982 and a long standing consultant to the authors of the "Complete Price Guide to Watches." Jim has written numerous articles for watch and jewelry publications including HR magazine, the NAWCC bulletin and the Market Resource Guide. He is also the co-author of "The Complete Guide to Antique Jewelry." In the late 1970's Mr. Wolf majored in classical guitar at the State University of New York and went on to a concert career as member of the Buffalo Guitar Quartet with appearances at Carnegie Hall and many major concert venues in the United States and Canada. In the 1990's, Jim played second chair cello as a volunteer with the Sarasota Pops Orchestra. Jim and his wife Julie enjoy musical and cultural events and spirited golf matches in their spare time.

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Jessica DuBroc
Assistant Director, Fine Jewelry, Dallas
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1-877-HERITAGE (437-4824)   Ext.1978
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Jessica DuBroc is a graduate of the University of Texas at Austin, and obtained her Graduate Gemologist degree through the Gemological Institute of America (GIA). Her early interest in the jewelry business stemmed from her family, namely her great-grandfather, who was a diamond cutter, and grandfather, who operated a jewelry business. She has worked in a number of jewelry venues, including wholesale, retail, consignment, appraisal, and auction for over a decade. Jessica is a member of the National Association of Jewelry Appraisers (NAJA) and Women’s Jewelry Association (WJA). 

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Peter Shemonsky
Director, Fine Jewelry, San Francisco
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1-877-HERITAGE (437-4824)   Ext.1135
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Mr. Shemonsky has worked within the jewelry industry throughout his professional career in retailing, design, manufacturing and the auction business. He holds a B.F.A. from the Philadelphia College of Art a Graduate Gemologist degree from the Gemological Institute of America.  

Prior to joining Heritage, he ran his own by-appointment appraisal and jewelry business in San Francisco, Ca. He is the former director for the international jewelry buying company CIRCA in San Francisco and Hong Kong. Previously he was the director of the fine jewelry and timepiece department of Bonham's auction house for North America.  

He is the course writer and instructor for the International Society of Appraisers course on Antique and Period Jewelry. In addition, he is a nationally recognized lecturer and writer on antique and period jewelry, and one of the founding board members for the American Society of Jewelry Historians West Coast chapter and has been a featured appraiser with the Antiques Roadshow for the past 16 years.

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Tracy Sherman
Director, Fine Jewelry, Palm Beach & New York
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1-877-HERITAGE (437-4824)   Ext.1146
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Before joining Heritage, Tracy originally hailed from the Buffalo, New York area and was working toward a BA in Art History at SUNY Buffalo before she was given an opportunity to start her career in Jewelry at Sotheby’s in NYC. Over 22 years, Tracy developed her expertise in jewelry while heading various departments. As an auctioneer, she proudly auctioned the estates of Ella Fitzgerald and George Burns among others, and was an integral player for the jewelry in auctions for the Duchess of Windsor, Andy Warhol and Jackie Kennedy Onassis while at Sotheby’s.  Tracy left Sotheby’s to open her own jewelry brokerage business and do what she loves — helping clients refine their collections by adding to them or selling their unworn or unwanted pieces. Among her accomplishment, she spearheaded the sale of the estate of Marge Kelly’s jewelry collection at public auction for $8 million. In addition, she opened and ran a Palm Beach buying office for a New York firm (CIRCA) for six years.  For the past four years, Tracy has returned to run her own business in Palm Beach, assisting clients in all areas of art and antique collecting, whether through formal appraisals, buying or selling, and using her network of allied professionals and collectors to achieve the best financial outcome for her clients. Additionally, she is USPAP certified to ensure compliance with today’s insurance and IRS requirements.   

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Diane D'Amato
Director, Luxury Accessories, New York
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1-877-HERITAGE (437-4824)   Ext.1901
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Diane D'Amato is the Director of Luxury Accessories at Heritage. Diane made her name in the Luxury Accessories world following high profile positions working for Hermès of Paris and Louis Vuitton, where her buying trips to Paris were influential in setting market trends in the United States and she oversaw more than $12 million in annual sales. Her specialty is in creating exclusive marketing partnerships and forging loyal client relationships. Diane is based in New York, joining the talent-rich Heritage team stewarding the brand, where she assists consignors and collectors with appraisals as well as supervising the category's double digit growth.


Diane has used her talents to do extensive charitable fund raising,  including sales that have benefited FATE (Foundation for Autism Training & Education), Crohn's and Colitis Foundation of America and St. Jude Children’s Research Hospital.

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Gina D'Onofrio
Director, Fine Jewelry, Beverly Hills
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1-877-HERITAGE (437-4824)   Ext.1153
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Gina D’Onofrio, FGA, ASA
Director of Fine Jewelry, Beverly Hills  

With work in the retail, auction and manufacturing sectors of the jewelry industry since 1989, Gina D’Onofrio’s experience encompasses jewelry design and production, appraisals, buying and selling of contemporary, antique and period jewelry, sales and management.

Prior to joining Heritage, Gina operated an independent gemological laboratory, appraisal service and consulting firm and has been catering to private individuals, banks, trusts, non-profit organizations, insurance companies, legal firms and the jewelry trade in the greater Los Angeles area.

Gina received her Master Gemologist Appraiser® designation, upon completion of appraisal studies, written and practical examinations and peer appraisal report review with the American Society of Appraisers. In addition, she was awarded the Certified Master Appraiser designation with the National Association of Jewelry Appraisers. In 2013, Gina received Los Angeles Magazine's coveted “Best in LA” award for her Jewelry Appraisal Services.

She conducts presentations and speeches about appraisal and jewelry related topics to private and corporate groups in the Los Angeles area. Gina is currently serving as Gems and Jewelry Education Chair for the American Society of Appraisers and co-instructor for their Appraisal Report Writing For Insurance Coverage course.

Professional Affiliations
• Fellow of the Gemmological Association of Great Britain (FGA)
• Fellow of The Gemological Association of Australia (FGAA)
• Certified Master Appraiser of the National Association of Jewelry Appraisers (NAJA)
• Accredited Senior Gemologist, Accredited Gemologists Association (AGA)
• Member of the National Association of Watch and Clock Collectors, (NAWCC)
• Accredited Senior Member & Master Gemologist Appraiser®, (ASA)

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Jonathon Burford
Consignment Director, Watches & Fine Timepieces, Beverly Hills
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1-877-HERITAGE (437-4824)   Ext.1132
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Jonathan Burford has worked in the fine watches and vintage automobile industry for the majority of his professional career. Fascinated by mechanical engineering, he started collecting wristwatches from a young age, primarily those with a motorsports association that reflected his other great passion for classic cars and racing.  After studying for a Business and Economics degree from UWE Bristol in Great Britain, Jonathan worked as a Director of Sales at the international marketing company Mice Group plc. While competing in a number of pan European classic car rallies and race series, he joined the luxury lifestyle brand Supercar Club as Commercial Director. There, he built out the luxury products arm and re-launched its luxury lifestyle Magazine Supercar, writing regularly on fine vintage and modern watches as well as super cars and other luxury products. Jonathan was luxury consultant to the British International Motorshow and curator to its Heritage Collection, as well as a number of UK-based luxury Concours d'Elegance events. He subsequently joined London-based Privatus, a private sales and advisory company focused on rare collectibles, as Head of Watches and Fine Timepieces, advising and brokering for a client base of private banks, family offices and other high net worth individuals. Jonathon has privately advised and assisted numerous high net worth clients with the sourcing, curating and disposal of fine watches, as well as helping to build two notable collections of vintage timepieces. He has written extensively on watch collecting and investing for a number of publications, including Bentley Magazine, EFG Private Bank and Arbuthnot Latham Private Bank Magazine. Jonathon relocated from London to Los Angeles in 2016 with his wife, a film editor, and two young children, joining his wife’s family that includes mother-in-law, legendary film editor and academy award winner Anne V. Coates.

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Keith Davis
Consignment Director, Watches & Fine Timepieces, New York
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1-877-HERITAGE (437-4824)   Ext.1971
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Keith Davis has worked within the timepiece industry for the entirety of his professional career, gaining valuable experience in nearly every aspect of the business. Prior to joining Heritage Auctions, he held executive and management positions at Richemont Group and LVMH. In his last role, Keith served as Commercial Director for Vacheron Constantin, overseeing the wholesale distribution for the brand in the U.S. and Canada. Prior to that position, he managed multiple regions for Bvlgari N.A., while also serving as the technical watch trainer for their retail and wholesale distribution.  

Keith’s introduction to the industry started in watchmaking and progressed to vintage restoration apprenticeships in England and the U.S. After several years of study, he worked in luxury watch retail and as a private appraiser and authenticator of vintage and antique wristwatches.

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Barbara Stone
Consignment Director, Luxury Accessories
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1-877-HERITAGE (437-4824)   Ext.1336
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Barbara Conn is Consignment Director for Luxury Accessories.  Her expertise in the luxury handbag market is extensive, with over a decade in the high-end accessories segment as a business owner and consultant. After a 15-year career in entertainment marketing, Barbara transitioned to the luxury goods arena. She is an expert in appraisal and authentication and her counsel is frequently sought in the field. Barbara has strong relationships with buyers, sellers and consignors from coast to coast, along with an in-depth knowledge of the Luxury marketplace.

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Ruth Thuston
Director, Fine Jewelry, Chicago
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1-877-HERITAGE (437-4824)   Ext.1929
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Ruth Thuston, who joined Heritage Auctions’ Chicago office as Director of Fine Jewelry, brings a wide range of jewelry experience to her position. Providing wise and fair service to clients who choose to sell their jewelry assets is of utmost importance to Ruth. For more than a decade she directed the Chicago office of CIRCA, an international company that buys and resells antique, period and estate jewelry, during which she facilitated the selling process for thousands of clients. Earlier in her career, she channeled her passion for jewelry and her clients who own it by helping them find the perfect item at both CD Peacock and Sidney Garber. Ruth holds a BA in Music from Albion College and a Graduate Gemologist degree from Gemological Institute of America (GIA).  She is a member and former chapter president of the Women’s Jewelry Association, (WJA), in addition to being a member of The American Society of Jewelry Historians and Chicago Jewelers Association, and sits on the boards of several charitable organizations. Ruth is also the recipient of the WJA Shining Star award in recognition of her contributions to her local WJA chapter.

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Ana Wroblaski
Assistant Director of Fine Jewelry, Beverly Hills
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1-877-HERITAGE (437-4824)   Ext.1154
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Ana Wroblaski

Consignment Director, Beverly Hills  

Prior to joining Heritage Auctions, Ana Wroblaski has been involved in the jewelry business on various levels since 1999. Born in Chicago and raised in Los Angeles, she joined John Moran Auctioneers in Pasadena during 2011 to take charge of their growing jewelry department. Previously, Ana spent five years at Bonham’s and Butterfield’s Los Angeles, first starting as assistant to the senior specialist before she was promoted to a specialist, appraising and cataloging jewelry that ranged from antique to modern.

Once Ana got a taste of working with precious metals on her own, she served as an apprentice with a master jeweler in the Downtown Los Angeles Jewelry District. Focusing on minerals and gems, she then went on to fabricate and design jewelry for her own line and others as well. Ana is a Graduate Gemologist, earning her diploma from the Gemological Institute of America (GIA), an Accredited Jewelry Professional (AJP) and is constantly continuing her education by attending workshops and seminars to stay abreast of treatments, new mine discoveries and current style trends in the jewelry world.  

Ana has earned and stays current with the Uniform Standards of Professional Appraisal Practice (USPAP), and is currently working on the accreditation curriculum with the American Society of Appraisers (ASA).