Minerals 2015, 5, 61-79; doi:10.3390/min5010061 OPEN ACCESS minerals ISSN 2075-163X www.mdpi.com/journal/minerals Article Advances in Trace Element “Fingerprinting” of Gem Corundum, Ruby and Sapphire, Mogok Area, Myanmar F. Lin Sutherland 1,2,*, Khin Zaw 3, Sebastien Meffre 3, Tzen-Fui Yui 4 and Kyaw Thu 5 1 School of Science and Health, University of Western Sydney, North Parramatta Campus, Sydney, Penrith PO NSW 2075, Australia 2 Geoscience, Australian Museum, 6 College Street, Sydney, NSW 2010, Australia 3 CODES ARC Centre of Excellence in Ore Deposits, University of Tasmania, Hobart, Tas 7001, Australia; E-Mails:
[email protected] (K.Z.);
[email protected] (S.M.) 4 Institute of Earth Sciences, Academia Sinica, Nankang 115, Taipei, Taiwan; E-Mail:
[email protected] 5 Geology Department, Yangon University, Yangon 11041, Myanmar; E-Mail:
[email protected] * Author to whom correspondence should be addressed; E-Mail:
[email protected] or
[email protected]; Tel.: +61-2-9685-9988; Fax: +61-2-9685-1195. Academic Editor: Ian Graham Received: 26 June 2014 / Accepted: 10 December 2014 / Published: 30 December 2014 Abstract: Mogok gem corundum samples from twelve localities were analyzed for trace element signatures (LA-ICP-MS method) and oxygen isotope values (δ18O, by laser fluorination). The study augmented earlier findings on Mogok gem suites that suggested the Mogok tract forms a high vanadium gem corundum area and also identified rare alluvial ruby and sapphire grains characterised by unusually high silicon, calcium and gallium, presence of noticeable boron, tin and niobium and very low iron, titanium and magnesium contents.