The Gemmological Association of Hong Kong

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	Special Announcement

	Contact GAHK The Gemmological Association of Hong Kong Ltd P.O. Box 97711, Tsim Sha Tsui, Kowloon, Hong Kong Tel. (852) 2366-6006 / Fax. : (852) 2153-9673 E-mail : info@gahk.org

GAHK Journal 2017

	Table of Contents
	A Word from the Editors
	GAHK Board of Directors
	Letter from the Chairman
	A calendar of events organized by GAHK
	Gems from Life, To Ban or not to Ban – that is the Question
	Standard Methods for Testing Fei Cui for Hong Kong (extract)
	Black Pearls – Grey Pearls
	Diamond Testers with a limited performance
	Beyond Octahedra: Inclusions in Spinel
	A Sapphire’s Secret
	The Formation of Quartz Crystal Geodes in Southern Red Agate from Liangshan, Sichuan, China
	Visit to Chuncheon Nephrite Mine in Korea
	Anorthite with Uvarovite Garnet Inclusions
	Traditional Negotiating Methods in the Jade Industry Veiled and Unveiled Pricing
	Reinvestigation of the Causes of Colour in Natural and Irradiated Green Spodumene
	The Chemical Composition & Gemmological Characteristics of Fei Cui from Guatemala
	Gemmological Features of Colourful Jade (Caiyu) from Shilin, Yunnan Province, China