President, USA

Hackman is President of the International Colored Gemstone Association (ICA) and managing director of Intercolor USA. He holds a Master’s degree from University of Missouri, Columbia, USA.

Hackman has been a partner at the New York-based Intercolor USA since 1978 and a partner at the Arusha-based Signature Gems since 2010, both specializing in tanzanite.


Hackman has been a member of ICA since 1984 and served two terms in the ICA board.

He is also a member of several organizations serving the trade in the United States including three terms as AGTA board members and treasurer plus one term as president.

Board of Directors

Benjamin Hackman

President, USA

Damien Cody

Vice President, Australia

Santpal Sinchawla

Vice President, Thailand

Marcelo Ribeiro

Treasurer, Brazil

Bruce Bridges

Secretary, USA

Ehud Harel

Secretary, Israel

E. Gamini Zoysa

Secretary, Sri Lanka

Alice Muthama

Director, Kenya

Captain Ramji Sharma

Director, Japan

Duncan Mclauchlan

Director, UK

Gabriel Angarita

Director, Colombia

Henry Ho

Director, Thailand

Masaru Mizumura

Director, Japan

Nirmal Kumar Bardiya

Director, India

Pavel Sokolov

Director, Russia

Philippe Scordia

Secretary & Director, France

Rakesh Jain

Director, Hong Kong

Shirley Xue Li Zhang

Director, Hong Kong

Stephan Reif

Director, Austria

Vijay Kedia

Director, India

Warren F. Boyd

Director, Canada

Yu Xiaojin

Director, China

Clement Sabbagh

Advisor, Brazil

Jean Claude Michelou

Advisor, Colombia

Jeffrey Bilgore

Advisor, USA

Wilson Yuen

Immediate Past President, Hong Kong

Gary Roskin

Executive Director, USA

About Us

The ICA is a worldwide body specifically created to benefit the global colored gemstone industry by advancing and promoting the knowledge and appreciation of colored gemstones.
New York Office: 31 West 47th St., Suite 1103, New York, NY 10036
+1 (212) 620-0900
ica (at) gemstone.org
Hong Kong Office: Unit 311B, 3rd Floor, Heng Ngai Jewelry Centre No. 4 Hok Yuen Street East, Hung Hom, Kowloon, Hong Kong
+852 2365-9318
ica (at) gemstone.org

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