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September 1, 2020
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Brendan M. Laurs; Alexander U. Falster; William B. "Skip" Simmons
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The Journal of Gemmology
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October 1, 2019
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Karen Webber; William B. "Skip" Simmons; Alexander U. Falster
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Rubellite
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January 1, 2019
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Alexander U. Falster
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Rubellite
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June 1, 2017
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Cara Williams; John Bear Williams; Brendan M. Laurs; Alexander U. Falster; William B. "Skip" Simmons
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The Journal of Gemmology
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January 1, 2016
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Cara Williams; Alexander U Falster; William B Simmons; John Bear Williams
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The Journal of Gemmology
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January 1, 2016
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J.C. (Hanco) Zwaan; Alexander U. Falster; William B. "Skip" Simmons; D. Blauwet
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The Journal of Gemmology