Our Story

Gemworld International was incorporated by Richard Drucker in 1985, three years after he developed what is now known as GemGuide. The publication which is recognized as the leader in market information has been used for valuation and information in more than 40 countries by jewelers, appraisers and as a reference in legal cases involving valuation. We have also acted as expert witness in certain cases. Gemworld has also developed educational classes and workshops that have been taught in several countries. Gemworld has hosted five gemological conferences drawing speakers and attendees from all over the world. As independent consultants, Gemworld offers products and services to the trade as well as performing appraisals for consumers and the trade. The staff of Gemworld includes four graduate gemologists of which three have won the prestigious Excellence in Gemology industry award from the Accredited Gemologists Association.


Richard Drucker creates the first GemGuide and quickly gains worldwide industry attention.


Gemworld International created.


GemGuide appraisal desktop software introduced.


Gemworld begins hosting hands on workshops, conferences and education opportunities.


Gemworld continues to service over 2000 clients and hold international conferences as an industry leader for gemstone pricing and education.


Richard B. Drucker GIA GG, FGA (Hon)


Stuart M. Robertson, GG

Vice President

Susan Drucker

Treasurer, Technical Support

Jennifer Santi, GG (GIA), CG (AGS)

Appraiser, Project Administrator

Ryan Faloona

Technical Support

Bradley Rooks

Subscriptions & GemGuide Pricing App

Çiğdem Lüle, PhD, FGA, GG (GIA), DGA

Education Consultant

David L. Bucks, Vice-President Field Inventory Examinations

Kathleen Brucher



Richard Drucker


1.847.657.0555 x 204

Stuart Robertson

Price Research & Consulting

1.847.657.0555 x 203

Cigdem Lule

Education Workshops

1.847.657.0555 x 207

Jennifer Santi

Appraisal Appointments

1.847.657.0555 x205

Susan Drucker

Technical Support/Appraisal Software

Monday-Friday 9:00 am to 4:00 pm Central

1.847.657.0555 x 206

Ryan Faloona

Technical Support/Appraisal Software

Monday-Friday 9:00am to 5:00pm Central

1.847.657.0555 x202

Bradley Rooks

General information or Subscriptions

1.847.657.0555 x 201

General Support

1.847.657.0555 x 201


2640 Patriot Blvd., Suite 240
Glenview, IL 60026
1.847.657.0550 (fax)


Monday-Friday 9:00 am to 5:00 pm Central

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