Challenges in Orienting Alexandrite: The Usambara and Other Optical Effects in Synthetic HOC-Grown Russian Alexandrite
Overview and commentary on the 2013 Journal of Gemmology article “Synthetic alexandrites grown by the HOC method in Russia: Internal features related to the growth technique and colorimetric investigation.”
Beryllium in Blue Sapphires, Both Natural and Diffusion-Treated
Overview and commentary on the 2013 InColor article “Blue Sapphires and Beryllium: ‘An Unfinished World Quest.’”
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