RESEARCH AND CONTRIBUTIONS

1990 Spring Gems & Gemology pg. 100:  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 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. 24COBALT DIFFUSION-TREATED SPINEL

2016 Spring Gems & Gemology pg. 72-72Hydrophane 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 & SapphireA Gemologists’s Guide ***

2018 ICA InColor Special Emerald IssueThe 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

2022 Spring Gems & Gemology, pg. 63Apatite Oiling: Before and After