Purple Tourmaline from Zambia
- September 1, 2020
- Brendan M. Laurs; Alexander U. Falster; William B. "Skip" Simmons
- The Journal of Gemmology
The Dunton Gem Quarry
- October 1, 2019
- Karen Webber; William B. "Skip" Simmons; Alexander U. Falster
- Rubellite
Rubellite Chemistry
- January 1, 2019
- Alexander U. Falster
- Rubellite
Tourmaline (dravite) from the Simanjiro District, Tanzania
- June 1, 2017
- Cara Williams; John Bear Williams; Brendan M. Laurs; Alexander U. Falster; William B. "Skip" Simmons
- The Journal of Gemmology
Lace opal from Utah
- January 1, 2016
- Cara Williams; Alexander U Falster; William B Simmons; John Bear Williams
- The Journal of Gemmology
Tantalite-(Mn) from Grangal, Nuristan, Afghanistan
- January 1, 2016
- J.C. (Hanco) Zwaan; Alexander U. Falster; William B. "Skip" Simmons; D. Blauwet
- The Journal of Gemmology