Whether you are here to appraise an item, purchase or sell jewelry, Geolat brings you 30 years of expertise, and a reputable partner by your side.

Our experience as expert appraisers in the jewelry business gives you access to an unparalleled reservoir of knowledge – making buying, selling or appraising a very personalized, easy and convenient process.

We are uniquely qualified to deliver a service of excellence: 97% of our business comes through word- of-mouth, personal, and business referrals.

Patti Geolat’s distinguished reputation as the best of the Dallas county appraisers, as well as on a national scale, has been unsurpassed for the past 30 years. Her opinion is valued by the jewelry industry and the worldwide media alike. Patti’s 9 year experience as the Jewelers Mutual Chairman of the Board, plus 15 years on the Jewelers Mutual Board of Directors offers you a hard to find perspective on value, insurance and best practices in the jewelry industry.

Geolat offers an extensive collection of estate and vintage jewelry in Dallas, carefully curated through our network of national and international partners and retailers. We are happy to showcase these gems for you online, and offer you the comfort and ease of perusing them from where ever you may be.

Geolat takes great care in providing you with the very best in quality and merchandise, expertise and customer care. We look forward to serving you.


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  • Patti J. Geolat Founder and CEO

    Patti J. Geolat, the founder and CEO of Geolat Companies, began her career at a jewelry sales counter, and today is a widely known authority on the appraisal, brokerage and sale of fine jewelry.

  • Judy Asa Vice President, Operations

    With more than 17 years as Patti’s right hand, Judy truly shines when it comes to taking care of our clients. In addition to overseeing day-to-day operations, Judy serves in the role of General Manager for multi-appraisal residential contents assignments, coordinating the efforts of specialists in antiques, fine art, Asian items, textiles, furniture, silver and glass. She is also a practiced expert at research, examination and valuation of fine jewelry and gemstones.

Expert Appraisal Consultants

Roger Ponn, GG, FGA  

As Geolat and Associates, Inc. has expanded geographically across the country as well as by type of property appraised, it was only logical that we should grow with a firm that could add to our expertise in both on-site examination and market research.

In order to better serve our client base with second and third homes around the North American continent, Geolat & Associates, Inc has established an alliance with Roger Ponn Associated Appraisers.  Whether our clients have sports memorabilia collections, wine cellars, or a whole room installed with porcelain dolls, we are prepared to catalog the property.  Our close partnership with the Ponn group dates back over 25 years allowing us the ability to leverage a vast network of experts and appraisers around the country.

As our client, you benefit from having the expertise available when needed, without paying for the overhead.

Ellen A. Amirkhan, ISA-CAPP, Oriental and Area Rugs

Ms. Amirkhan holds the designation of Certified Appraiser of Personal Property (CAPP), with a specialty in Oriental Rugs and is a Certified Oriental Rug Appraiser (CRA) through The Oriental Rug Retailers of America (ORRA). She is an accredited member of the North Texas Chapter of the International Society of Appraisers (NTISA), and is certified in the Uniform Standards of Professional Appraisal Practice (USPAP).

She is a co-author of A Comprehensive Guide to Oriental and Specialty Rug Cleaning, an in-depth cleaning and rug identification guide that serves as a reference manual to professional cleaners and appraisers.

Ellen is a leader in service to her industry. She is Past President of the National Institute of Rug Cleaning, the Restoration Industry Association (RIA) and the North Texas Chapter of the International Society of Appraisers.

Ellen Amirkhan earned a BS from Texas Woman’s University and an MLA from Southern Methodist University.

Daphne Lange Rosenzweig PHD, ISA, CAPP, Asian Art and Archaeology

Daphne Lange Rosenzweig, author, professor, museum exhibition organizer, and appraiser, is a specialist in the field of Asian Art and Archaeology. An Asian art consultant to museums nationwide, she has organized numerous traveling exhibitions on subjects as diverse as Chinese jades, 18th century Chinese court art, Chinese and Japanese painting and ceramics, Korean art, and Japanese prints.

Dr. Rosenzweig has presented many lectures for international and national audiences; including the Morikami Museum of Japanese Art’s National Endowment for the Arts Lecture Series, the International Netsuke Society, the College Art Association, the Association for Asian Studies, the Ringling Museum of Art, and International Society of Appraisers and American Society of Appraisers annual conferences.

Dr. Rosenzweig earned her A.B. from Mount Holyoke College and her M.A. and Ph.D. from Columbia University in Asian Art and Archaeology.

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