RESEARCH AND CONTRIBUTIONS
1990 Spring Gems & Gemology pg. 100: Diffusion treated corundum
1990 Summer Gems & Gemology pg. 115-133: The identification of blue diffusion treated sapphires. Diffusion treated corundum
1993 Spring Gems & Gemology pg. 16-17 : Update on diffusion treated corundum: red and other colors
1995 Summer Gems & Gemology pg. 137-138 Kyocera plastic: Kyocera plastic-impregnated synthetic opals.
1996 Fall Gems & Gemology pg. 117-118: Update on Madagascar sapphires
2012 An Emerald Encryption: The Abhaya Emerald Buddha
2014 Ganoksin – TucsonGemShow – Jeffery Bergman Brings a Rare Treat To Tucson, Burmese Trapiche
Sapphire
2014 Ruby & Sapphire: A Collector’s Guide pg. 254
2015 Journal of Gemmology 34 / 05: Cover photo and pg. 393 – “Zawadi” Sapphires
2016 SSEF Facette pg. 24: COBALT DIFFUSION-TREATED SPINEL
2016 Spring Gems & Gemology pg. 72-72: Hydrophane Opal Treatments
2016 DiamondPulse : The Amazing Trapiche pg. 48-49
2017 Ruby & Sapphire: A Gemologist’s Guide pg. Cover photo, pg. 191,192, 334
2017 National Jeweler: 5 Things to Know About … Trapiche Gems
2017 Ruby & Sapphire: A Gemologists’s Guide ***
2018 ICA InColor Special Emerald Issue: The Ethiopian Halo-Shakiso Emerald pg. 68-72 plus cover photo
2019 Spring Gems & Gemology, pg. 85, 150: Ethiopian Emerald
2020 Spring Gems & Gemology, pg. 170-171: Trapiche Gems
2021 Emerald: Modern Gemmology by Dietmar Schwarz & Martial Curti pg. 03
2022 Spring Gems & Gemology, pg. 63: Apatite Oiling: Before and After
