Volume 36 / No. 3 / 2018 Volume 36 / No. 3 / 2018
Cover photo: Bumble Bee Stone from Indonesia is an unusual carbonate- rich rock that is coloured by arsenic sulphide minerals and may also contain COLUMNS black areas of ‘sooty’ pyrite. A pattern resembling an erupting volcano is Bumble Bee Stone seen in this cabochon (45 × 65 mm), and is reminiscent of the volcanic from Indonesia Tracking and Traceability What’s New 181 origin of this gem. Courtesy of Rare Earth Mining Company. in the Gem Industry Circling on
Alrosa Diamond Inspector | Ming Cultured Pearls D-Tect | DiaColor Colorimeter | Torcia 365 Long-wave LED Flashlight | Amberif 2017 and 2018 Proceedings | EGU General ARTICLES Assembly 2018 Gem Abstracts | FTC’s ‘Jewelry Guides’ Revised | Blockchain, Chain of Custody and Trace Elements: 212 Governing the Gemstone Sector: An Overview of Tracking and Traceability Opportunities Lessons from Global Experience | in the Gem Industry GSJ 2018 Annual Meeting By Laurent E. Cartier, Saleem H. Ali and Michael S. Krzemnicki Abstracts | PGI Insight 2018 | Sapphires from Mogok, Bumble Bee Stone: A Bright Yellow-to-Orange and 228 Myanmar | Wooshin Gem Lab Black Patterned Gem from West Java, Indonesia Magazine | Yellow Diamonds Educational Video | Call for By Emmanuel Fritsch and Joel Ivey Papers: Gem Issue of The Extractive Industries and Society An Explanation of a Specific Type of Circling as 240 | Diamond Museum Opens in Observed on Ming Cultured Pearls Botswana By Jean-Pierre Gauthier, Jacques Fereire and Thanh Nhan Bui
Gem Notes 186 Ametrine with Trapiche-like 208 230 Patterns from Brazil | Hessonite from Mogok, Myanmar | Yellowish Green to Yellow Opal from Brazil | Ethiopian Opal with Dendritic Inclusions | Large Phenakite from Madagascar | Poudretteite from Mogok, Myanmar | Pseudo- Photo by Orasa Weldon malachite from Slovakia | Quartz Slices from Madagascar with Interesting Inclusions | Red 213 Aventurescent Quartzite from Tanzania | Yellow Scapolite from Tanzania Showing Daylight Fluorescence | Cr-bearing Green Spodumene from Northern Nigeria | Titanite (Sphene) from Zimbabwe | Native Copper Inclusions in a Cu-bearing Tourmaline | Tourmaline Mining Photo by L. E. Cartier Photo by J. Ivey at Ijero, Nigeria | Reduced Phosphorescence of Synthetic Diamonds After Electron Beam Conferences 253 Irradiation | Ammonites Inlaid with Ammolite and Turquoise | AGA Las Vegas | 22nd Meeting of the International Unusual Matrix Opal Imitations | Mineralogical Association 55th Myanmar Gems Emporium Learning Opportunities 258 Gem-A Notices 268 Letters 211 Transparency of Emerald New Media 262 Literature of Interest 269 Tanzurine
The Journal is published by Gem-A in collaboration with SSEF and with the support of AGL.
ISSN: 1355-4565, http://dx.doi.org/10.15506/JoG.2018.36.3 THE JOURNAL OF GEMMOLOGY, 36(3), 2018 i