Feature articles from this issue:
- Internal Structures of Known Pinctada maxima Pearls: Natural Pearls from Wild Mollusks by Artitaya Homkrajae, Areeya Manustrong, Nanthaporn Nilpetploy, Nicholas Sturman, Kwanreun Lawanwong, and Promlikit Kessrapong
- Technical Evolution and Identification of Resin-Filled Turquoise by Ling Liu, Mingxing Yang, Yan Li, Jingru Di, Ruoxi Chen, Jia Liu, and Chong He
- How to Calculate Color from Spectra of Uniaxial Gemstones by Che Shen, Aaron Palke, Ziyin Sun, and Mark D. Fairchild
- Micro-Features of Spinel by Nathan Renfro, John I. Koivula, Shane F. McClure, Kevin Schumacher, and James E. Shigley
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