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 2008


2008 GAHK Board of Directors 4


Chairman’s Report 5


Association Activities 8


In Memoriam Grahame Brown (1936-2008) 10


Corundum of the Russian Far East 13


Gem Glass of Chzhurchzhen in the Russian Far East 19

Moonstone & Co.
A Brief Review of the Feldspar Group 25


Where are We Going?
Trends and Challenges in Gemmology
Now and in the Future 30


翡翠川蠟含量的定量測試方法研究 40


中國透閃石及透閃石玉的資源及分佈 47


石榴石的拉曼光譜研究 56


5000 Years of Gemmology 63

寶石學的上下五千年 63


Colour-change Beryl from Brazil 71


Charoite - A Champion among Mineralogical
Discoveries in the Second Half of the 20th Century 77


高溫擴散法改色低品質藍寶石工藝改善研究 83


The Principles of the Leichart Opal Grading System 1.0 93

 

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