James Shigley

Headshot of Dr. James Shigley, Distinguished Research Fellow

Title: Distinguished Research Fellow, Carlsbad CA

Areas of expertise: gem identification; synthetic and treated diamond identification; gemology and mineralogy of colored stones

Selected Published Research


  • Bachelor of science in geology, University of California Berkeley, Berkeley, California, United States, 1971 
  • Ph.D in geology, Stanford University, Stanford, California, United States, 1982
    • Thesis: Phosphate minerals from the Stewart Mine, Pala, California
    • Advisors: Gordon Brown (Stanford University), Richard Jahns (Stanford University), and Richard Erd (United States Geological Survey)

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