David Tsao

David grew up in his family’s jewelry business. He earned the Graduate Gemologist^® and Graduate Jeweler diplomas from GIA in 1996, and subsequently received a master valuer diploma. David then worked for five years in the retail jewelry and pearl wholesale businesses. In 1996, he was hired as an on-campus instructor at GIA in Taipei. In 2000, he taught GIA extension courses in China. David excels in the theory and practice of diamond grading, colored stone grading, gem identification, and pearl grading.