Ulrika F.S. D’Haenens-Johansson spcializes in defect physics of natural, treated and synthetic diamond materials using optical and EPR spectroscopy

Wasura (May) Soonthorntantikul specializes in corundum spectroscopy.

Jim Conant specializes in mathematics, algorithms, diamond optics, diamond design, data analysis, artificial intelligence/machine learning.

Troy Blodgett specializes in clarity, cut, and analytical problem solving.

Mike Jollands specializes in point defects, diffusion kinetics, experimental petrology, infrared spectroscopy, mass spectrometry

Makoto Miura specializes in Peridot, Jadeite, Mantle Petrology, Geology, Mineralogy and Geochemistry, Field geology, Volcanology, Raman spectroscopy, LA-ICP-MS

Chunhui Zhou specializes in pearls and related materials.

Kazuko Saruwatari specializes in colored gemstones and pearls.