Gemstones: Quality and Value, Volume 1
Yasukazu Suwa is president of Suwa & Son, Inc., a Japanese  gemstone dealer business established in 1908.  Since becoming the  first Japanese national to earn his Graduate Gemologist certification  from the Gemological Institute of America in 1965, Mr. Suwa has  traveled to gemstone mining, cutting, and distributions centers around  the globe while establishing his firm as one of the premier wholesale  gemstone importers in Japan.Director of the Japan Jewelry Association since 1997, Mr. Suwa has  also sat on the Boards of Directors and Executive Committees of major  Japanese and international colored stones trade organizations.  He has  also been educating consumers through the NHK (Japan Broadcasting  Corporation) Educational Institute's Jewelry Course since 1991.A strong proponent of educating both the industry and consumers  regarding the quality and value of gemstones, Mr. Suwa has written  three books on the subject and developed a system for verifying the  quality and judging the value of the different varieties of gemstones.