Organizer : L’ÉCOLE- GAHK
Topic :   Discover the Diamond: Art & Science Guided Tour
Date :   2026/03/22 - 2026/03/22
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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
 

 

Full Version

Compressed Version

GAHK Journal 2025

Front and Back Cover
Table of Contents
A Word from the Editors
GAHK Board of Directors
Letter from the Chairman
A calendar of events organised by GAHK
Obituaries
Decorative Features & Aggregates Symmetry of Vein-type Calcite Onyxes from the Torgashino Deposit (Krasnoyarsk Territory, Russia)
Identification of Filler Materials in Emeralds
Serpentinites of the Tyoya Iron-ore Deposit as a Coloured Decorative Stone and Its Use for Manufacture of Collection, Jewellery & Carved Products (Republic of Khakassia, Russia)
Award Winning Works of GAHK Gemstone Microscopic Photography Contest 2024 (Gemstone Microcosm – Beautiful World)
Literature Review
The Coat of Arms of The Gemmological Association of Hong Kong
The Importance of Geographic Origin of Rubies
Composition Characteristics of White Nephrite from Dikou, Fujian, China
The Gemmological & Mineralogical Characteristics of Northern Laos Yellow Seal Stone
Differences between High-quality Green Fei Cui from Guatemala & Similar Fei Cui from Myanmar

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