Organizer : GAHK
Topic :   Classification and Grading of Opal
Date :   2018/07/27 - 2018/07/27
Detail

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- GAHK 21-24th June UMB Show at HKCEE Booth No: 3B139, Hall 3 (2018/05/31)
  Detail
- 2018 Membership Renewal Subscription (2018/01/04)
  Detail
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) 2780-5920

E-mail : info@gahk.org
 

 

FULL VERSION

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

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