Ron Ringsrud owner, was the host and guide in Bogotá for visits to the emerald marketplace since 1986. He has hosted such groups as the L.A. County Museum of Natural History and the G.I.A. on their trips to the Colombian emerald source.

Ronald Ringsrud Co. is a wholesale emerald importing business based in Saratoga, California, and Bogotá, Colombia.

Publications and Awards

• The Enhancement of Emeralds in Bogota, Colombia - Gem & Gemology Magazine, Fall 1983, pages 149-156
• Coscuez: A Major Source of Colombian Emeralds - Gems & Gemology, Summer 1986 pages 68 -79
• Muzo Emerald - Lapidary Journal, Jan.1988
• Tunnels in Use at Muzo Colombia - In Focus (Quarterly publication of the G.l.A. Alumni Association) Summer 1989
• Prospecting for Adventure - In Focus (Quarterly publication of the G.l.A. Alumni Association) Fall 1995
• Award: Most Valuable Article Award, 1983 Gems & Gemology Magazine
• Robb Report Magazine, November 2001, Hearts of Stone p.166

Presentations and Lectures:

• Gemological Institute of America, Student Assembly, Aug. 87
• G.l.A. Tour of South America: Bogotá 1988
• Museum of Natural History of L A. County Tour, Bogot. 89
• Gemological Institute of America, Aug. 90
• The Industrial Club, Monterrey, Mexico, Sept. 90
• G.l.A. International Symposium, Century Plaza Hotel, Los Angeles, Featured Speaker, June '91
• Industrias JD, Mexico City, Seminar on Gemology, May '95
• Foro Internacional de la Esmeralda, Colombian Mining Ministry, Bogotá, 1996
• FENALCO Colombian Business Roundtable, Bogotá Hilton, Aug. 1997
• AGTA Seminar, Tucson Convention Center, Feb. 1998
• First World Emerald Congress, Bogotá Radisson Center, Feb. 1998
• G.I.A. Alumni Association, Golden Gate Chapter, San Francisco, 1998
• G.I.A. Alumni Association, Central Valley Chapter, Sacramento, 1999
• G.I.A. Alumni Association, Las Vegas Chapter, 2001

Visit the Events Calender to see when Mr. Ringsrud's next lecture will be at the Gem Hunters Museum in Honolulu, Hawaii USA.