Laboratory-Grow Diamonds

GHI Releases Second Edition of the Book
A unique guide for gemologists from the pioneers of lab-grown diamond research and certification… with additional chapters, breakthrough research results, new diamond synthesis methods, advanced identification techniques and more

CANADA, Vancouver (December 21, 2007): In the field of gemology, the importance of laboratory-created diamonds and the sustained research effort that has been directed at them over the last three-and-a-half decades, signifies the important role these stones play in the gems and jewelry industry around the world. With the evolution of new growth processes, it is a challenging time for jewelers and gemologist. This is a period which requires more education and vigilance than ever before in order to maintain the distinction between natural and lab-grown diamonds.

Currently there are two known methods for growing gem-quality diamonds: the High Pressure High Temperature (HPHT) method and the Chemical Vapor Deposition (CVD) method. The way a diamond crystal grows leaves behind characteristics that can often be detected with careful examination. Explaining these two methods vividly, tracing their history, and teaching jewelers and gemologists the characteristics to look for when examining different types of laboratory-grown diamonds with both standard and advanced gemological equipment is what the book LABORATORY-GROWN DIAMONDS: Information Guide to HPHT-grown and CVD-grown Diamonds is all about.

Published by Gemology Headquarters International (GHI), an independent chain of gem grading laboratories, and authored by two of its senior managers, Branko Deljanin and Dusan Simic, who are considered international HPHT and CVD experts, the book is a result of in-house research and certification of all generation of synthetic diamonds since 2001 (a time when EGL USA were the first in the field to grade and certify these stones) making it a unique publication, the first of its kind to be brought out in the gems and jewelry industry. In this second edition, an illustration of the authors’ research results with scientists from around the world, they share their breakthrough findings with the trade highlighting the many changes and developments in growth-technology and identifications methods of lab-grown diamonds.

Selling price: US/CAN$ 20.00 plus tax and shipping.

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Some of the special features the book deals with are:
• Increased quantity of better quality and larger lab-grown HPHT and CVD diamonds in the market with a focus on major producers (including AOTC from Canada).
• Development of a new CISystem by EGL USA and GHI for faster screening, testing and identification of all diamonds coming to laboratories by a combination of testing techniques.
• The new CIS photoluminescence imaging system, a quick and reliable method for identifying the growing number of small lab-grown diamonds (less than 0.10 ct) set in jewelry.
• The new EGL USA and GHI grading and certification system for laboratory-grown diamonds.
• Advanced education programs on HPHT and CVD grown diamonds offered to the jewelry trade and consumers.

Authors Branko Deljanin and Dusan Simic said: “In the present scenario with laboratory-created diamonds becoming more common in the jewelry industry, jewelers and gemologists need to be more vigilant in learning how they can be identified. This new edition of the book LABORATORY-GROWN DIAMONDS: Information Guide to HPHT-grown and CVD-grown Diamonds
will provide the interested reader with a better understanding of the key distinguishing features between natural and lab-grown diamonds. Through this book, we aim to help the gem and jewelry trade view laboratory-grown diamonds as a unique part of our jewelry industry, rather than a threat to it.�?

About GHI:
Gemology Headquarters International (GHI) is an independent chain of gem grading laboratories. Established by the founders of EGL USA, GHI was set up as EGL USA’s expansion outlet to provide enhanced gem grading services in the U.S. and around the world. With its highly qualified team of professionals, many of whom have been trained in the EGL USA labs, GHI today continues to maintain the high quality standards and consistency of service that has been provided by EGL USA for over 20 years.

GHI has offices in the USA and India and is supported by a team of top-level scientists in gemology with many years of experience in identification, grading, research and certification of diamonds.
Through in-house investigations, field sampling and collaboration with leading scientists from the physics, geological and mineralogical worlds, the GHI research team has revealed new insights into issues of major concern and benefit to the jewelry trade. Such research acknowledgements are identification projects on HPHT treatments and multi-step treatments of natural diamonds, HPHT-grown diamonds, CVD-grown diamonds and coated diamonds.
For more information or an interview:
MEDIA CONTACT: Branko Deljanin, Project Manager, GHI Research,

ADDRESS: GHI Research, 409 Granville Street, suite 456, Vancouver BC V6C 1T2, CANADA
Tel: (604) 630-0464, Fax: (604) 630-0465, Cell: (604) 619-3590.


Education Programs
Introduction to Diamond Grading
Advanced Gemology - Diamonds
Advanced Gemology - Colored Stones
How to Sell Diamonds with EGL Certificates
Buying Better Quality Diamonds
Member of Canadian Jewellers Association
Rough Diamond Grading
Informative Articles
Informative Articles
To keep you abreast of new discoveries in gemstone research, synthetics and treatments, we have listed a selection of informative articles written by experts in their field. Check this page regularly for updates.
"European Gemological Laboratory Defines SI3"
Adding the SI3 clarity grade to the grading system was the next logical step.
'The Scoop on synthetics'
Can we ID them? Should we grade them? Do we need them?
'Cultured Confusion'
Should a man-made diamond be called "synthetic", or "cultured" and who are the important players in this controversial addition to the diamond industry?
"A Gemological Study of A Collection of Chameleon Diamonds"
The rarity of chameleon diamonds and their interest for the connoisseur are due to their unusual ability to change color temporarily when heated to about 150C, or after prolonged storage in the dark.
"Interpreting Diamond Morphology" - Part I
A diamond's morphological features reflect conditions of diamond formation and represent a unique characteristic than can be used to identify details of the sources of diamonds.
"Interpreting Diamond Morphology" - Part II
Morphological features reflect conditions both during diamond formation and also after emplacement, especially where alluvials are concerned.