• ICGL Newsletter Spring 2015: Emerald

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ICGL Newsletter Spring 2015

New issue of ICGL newsletter is released on 10th March 2015.
PDF version can be downloaded from next link.
ICGLNewsLetter-2015SP (19.9Mb)

The contents:

New type of emerald composite
By Jayshree Panjikar
Pangem Testing Laboratory, Pune, India

Unusual hydrothermal synthetic emerald with filled fractures
By Hyunmin Choi, Sunki Kim and Young-chool Kim
Hanmi Gemological Institute & Laboratory (GIG), Seoul, Korea

Soude-emeralds -Good imitations in modern times-
By TayThye Sun and Loke Hui Ying
Far East Gemological Laboratory, Singapore

Impregnated Russian hydrothermal synthetic emerald
By Kook-Whee Kwak and Eun-Ah Jeong
Wooshin Gemological Institute of Korea, Seoul, Korea

Introducing Regular Member 007
Mr. Travis Lejman
Gemological Appraisal Laboratory of America, Inc.

Members of ICGL met at Chiang Mai, Thailand on 7th December 2014

 

ICGL Newsletter Fall 2014: Blue sapphire and its treatment

ICGL Newsletter Fall 2014

New issue of ICGL newsletter is released on 21st November 2014.
PDF version can be downloaded from next link.
ICGLNewsLetter-2014FA (15.4Mb)

The contents:

Appearance of new treatment method on sapphire using HPHT apparatus
By Hyun-min Choi, Sun-ki Kim and Young-chool Kim
Hanmi Gemological Institute & Laboratory (GIG), Seoul, Korea

“BLUE SILK” Color change-like effect in pink sapphire from Batakundi
By Masaki Furuya
Japan Germany Gemmological laboratory, Kofu, Japan

Cobalt-doped glass-filled treated blue sapphire
By TayThye Sun and Loke Hui Ying
Far East Gemological Laboratory, Singapore

Punsiri type heat treatment of sapphire done in Khambat, India
By Jayshree Panjikar
Pangem Testing Laboratory, Pune, India

Current Trends within the Thai Gemstone Industry
Dietmar Schwarz and Yadhunath Ramakrishnan
Asian Institute of Gemological Sciences Thailand

Interview with Dominic Moc: Founding Member

ICGL Newsletter Summer 2014

New issue of ICGL newsletter is released on 23rd August 2014.
PDF version can be downloaded from next link.
ICGLNewsLetter-2014SU (1.05Mb)

 

The contents;

Identification of CVD Synthetic Diamonds
By Kook-WheeKwak, Wooshin Gemological Institute of Korea (WGK)

Recent CVD diamonds tested at Pangem Testing Laboratory
By Jayshree Panjikar, Pangem Testing Laboratory, Pune, India

Treated Black Diamond Earring
By Tay Thye Sun & Loke Hui Ying, Far East Gemological Laboratory, Singapore

A book review “Colour of Paradise” by Kris Lane, 2010
By Elisabeth Strack, Gemmologisches Institut Hamburg, Germany

Lab notes: 10 carats Asteriated Diamond and etc.

Interview with Masaki Furuya: Founding Member

 

ICGL Newsletter Spring 2014

New issue of ICGL newsletter is released on 1st July 2014.
PDF version can be downloaded from next link.
ICGLNewsLetter-2014SP (1.05Mb)

 

The contents;

Oiling of Star Rubies from Burma
By Tay Thye Sun & Loke Hui Ying, Far East Gemological Laboratory, Singapore

Ancient Roman Bead-Makers of Arikamedu, South India
By Jayshree Panjikar, Pangem Testing Laboratory, Pune, India

Routine Findings in the Gemmological Laboratory Black Synthetic Moissanite Sold as Black Diamond
By Elisabeth Strack, Gemmologisches Institut Hamburg, Germany

A book review “Colour of Paradise” by Kris Lane, 2010
By Elisabeth Strack, Gemmologisches Institut Hamburg, Germany

Innovative Idea of Teaching Gemmology
By Sunki Kim, Hanmi Laboratory, Korea

Interview with Elisabeth Strack: Founding Member

 

ICGL Newsletter Winter 2014

New issue of ICGL newsletter is released on 12th March 2014.

PDF version can be downloaded from next link.

ICGLNewsLetter-2014WN (11.2Mb)

 

The contents;

Non-resin type synthetic opal by Kyocera

By Masaki Furuya(1), Masanobu and Satoshi Miyazaki(2)

(1) Japan Germany Gemmological Laboratory, Kofu, Japan
(2) Nagomiishi Co, Ltd. Osaka, Japan

Collector’s Gem Petalite

By Jayshree Panjikar,Pangem Testing Laboratory,Pune, India

The Cheapside Hoard: London’s Lost Jewels
Exhibition at the Museum of London 11 October, 2013 to 27 April 2014

By Elisabeth Strack, Gemmologisches Institut Hamburg, Germany

Interview with Branko Deljanin: Former Founding Member

ICGL Newsletter Autumn 2013

New issue of ICGL newsletter is released on 9th November 2013.

PDF version can be downloaded from next link.

ICGLNewsLetter-2013AU (801Kb)

 

 

The contents;

Albite feldspar carving imitating jadeite-jade

By Tay Thye Sun (1), Wilawan Atichat (2) and Gao Yan (3)

(1) Far East Gemological Laboratory, Singapore
(2) Former GIT director, the Gems & Jewelry Institute of Thailand, Bangkok, Thailand
(3) Former senior gemologist, National Gem Testing Centre, Beijing, China

AGIL Hong Kong celebrates 30th Anniversary

By Dominic Mok, Principal, Asian Gemmological Institute and Laboratory, Hong Kong

Gemstone Industry and Laboratory Conference (GILC) Hong Kong 2013

By Tay Thye Sun and Loke Hui Ying, Far East Gemological Institute Pte Ltd, Singapore

Detection of heat treatment in red spinel using photoluminescence

By Masaki Furuya (1), Masanobu Suzuki (1) and Aya Nakajima (2)

(1) Japan Germany Gemmological Laboratory, Kofu, Japan
(2) Aya Co, Ltd. Tokyo, Japan

Association Francaise de Gemmologie Celebrates Golden Jubilee

By Elisabeth Strack, Gemmologisches Institut Hamburg, Germany

Introducing Founding Member 003:

Tay Thye Sun at Far East Gemological Laboratory

 

ICGL Newsletter Summer 2013

New issue of ICGL newsletter is released on 19th August 2013.

PDF version can be downloaded from next link.

ICGLNewsLetter-2013SU (8.9Mb)

 

The contents;

Identification of polymer impregnated quartzite imitating B-jade and B+C-jade

By Tay Thye Sun and Loke Hui Ying, Far East Gemological Institute Pte Ltd, Singapore

Infrared Reflection Spectra of Jadeite, Omphacite, Nephrite and Idocrase

By Dominic Mok – Principal Gemmologist of the Asian Gemmological Institute and Laboratory Ltd, Hong Kong

64th De Beers Diamond Conference,United Kingdom

By Jayshree Panjikar

Glass imitation sold as Zultanite in Turkey

By Elisabeth Strack, Gemmologisches Institut Hamburg

Introducing Founding Member 002:

Asian Institute of Gemmological Sciences

 

AIGS Lab is moving

AIGS Lab is moving to B1 level of Jewelry Trade Center.

We will be closed on 28 June 2013.

New Lab will be reopened on 1 July 2013 at

Room B24 in B1 Level.

www.aigsthailand.com

www.facebook.com/aigsthailand

moving_sign

ICGL Newsletter Spring 2013

ICGL second newsletter is released on 17th May 2013.

PDF version can be downloaded from next link.

ICGLNewsLetter-2013SP (6.7Mb)

 

The contents;

We connect… (Message from ICGL first president)

By Mr. Tay Thye Sun, President

New Members are welcome at ICGL

by Jayshree Panjikar, Membership Coordinator

A Rare Necklace with Maona Pearls

By Elisabeth Strack, Gemmologisches Institut Hamburg

Tucson 2013: A Reflection on Pearl Issues

By Elisabeth Strack, Gemmologisches Institut Hamburg

Spectroscopic Characteristics of “Merelani Mint” Grossular Garnet

By Masaki Furuya Japan Germany Gemmological Laboratory, Kofu, Japan

LAB NOTES:
Identification of Mysterious Large “Black Stone”

By Branko Deljanin, Canadian Gemological Laboratory
Bear Williams, Stone Group Labs

 

ICGL Newsletter Winter 2013

ICGL first newsletter was released at Tucson Gem show 2013.

PDF version can be downloaded from next link.

ICGLNewsLetter-2013WN (3.3Mb)

 

The contents;

International Consortium of Gem testing Labotories

By John Richoz,
Asian Institute of Gemological Sciences, Bangkok, Thailand

Screening and identification of diamonds for the synthetic origin using the uv lamp and the polarioscope mounted on a microscope

By Branko Deljanin, B.Sc., GG, FGA, DUG
Canadian Gemological Laboratory inc, Vancouver, Canada

Identification of natural, treated, synthetic and treated-synthetic yellow sapphire by feather type inclusions

By Jayshree Panjikar
Pangem Testing Laboratory, PANGEMTECH – Panjikar Gem Research & Tech Institute, Pune, India

Trading of Jadeite-Jade in Mandalay, Myanmar

By Tay Thye Sun & Tay Kun Ming
Far East Gemological Laboratory, Singapore