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Pacific BioLabs

Over 25 years of experience in preclinical and regulatory testing.

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Identify Synthetic Gems

Distinguish between natural and synthetic gemstones. Learn more

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GRC Announces Speakers, Calls for Abstracts

News | www.jckonline.com | Oct 1, 2008

The Gemological Institute of America has announced the speakers for the second Gemological Research Conference, which will take place Aug. 21–23, 2009, in San Diego. The speaker list includes George Rossman who will present the opening keynote.

http://www.jckonline.com/article/CA6601097.html?rssid=79

Untitled Page - FIELD REPORT FROM WINZA

RAPAPORT... Gübelin Gem Lab Ltd., Lucerne, Switzerland In November 2007, news started to spread in the Tanzanian gem-mining community that a promising new ruby deposit had been found near the village of Winza, in the Mpwapwa district of the Dodoma region.

http://www.diamonds.net/news/ExportItem.aspx?ArticleID=22226&Action=Print

Gemology, Mineral and Jewelry Links

American Gem Trade Association Gemological Testing Center – The foremost colored gem testing lab in America and home to Ruby-Sapphire.com's Richard W. Hughes. Sign up for their regular gemology updates.

http://www.ruby-sapphire.com/links.htm

Internationally Renowned Gem Expert Chris Smith Joins AGL

News | www.jckonline.com | Dec 1, 2006

American Gemological Laboratories, a subsidiary of Collectors Universe, announced Friday that internationally renowned gem expert Chris Smith has joined the company as vice president and chief gemologist, effective immediately. Smith will be working closely with AGL’s president C.R. Cap Beesley.

http://www.jckonline.com/article/CA6396662.html?industryid=704

Gubelin establishes fund for GIA publication

News | www.jckonline.com | Aug 19, 2003

Internationally respected gemologist, author, and lecturer Edward J. Gübelin has established a fund at the Gemological Institute of America in conjunction with the organization's Endowment Campaign. The donation will benefit the Institute’s quarterly professional journal, Gems & Gemology (G&G), by

http://www.jckonline.com/article/CA317591.html?industryid=668

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Certified Gemologist

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Testing Laboratories

Analytical Testing Laboratories Materials and Products Analysis

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How to Choose a Colored Gem Lab

News | www.jckonline.com | Oct 1, 1999

Colored gemstones are sent to laboratories to determine their authenticity, verify their country of origin, or identify treatments. Deciding which laboratory to use depends on what you need to know. Services and philosophies differ from one lab to the next. Here are some factors to consider when

http://www.jckonline.com/article/CA635065.html?industryid=46018

Diffusion or not, the labs agree but others object

News | www.jckonline.com | Mar 1, 2002

The AGTA's Gemological Testing Center, the GIA's Gem Trade Laboratory, the Gübelin Gem Lab, and the SSEF Swiss Gemmological Institute have all agreed that the padparadscha-appearing orange-on-pink corundum recently encountered in the market is to be called simply treated sapphire-not diffusion

http://www.jckonline.com/article/CA227350.html

A sapphire by any other name.

News | www.jckonline.com | Feb 1, 2001

Natural sapphire, natural color, is the conclusion of the Gemological Institute of America Gem Trade Laboratory Identification Report on the 80-plus-ct. transparent pinkish-orange oval mixed cut shown below. Dr. Eduard Gübelin's personal Quality Report from 1995 reads: This gem is probably the

http://www.jckonline.com/article/CA64687.html

Gübelin Gem Lab offers shuttle between Lucerne and the U.S.

News | www.jckonline.com | Jan 31, 2003

The Gübelin Gem Lab has launched a new courier service that enables American clients to ship their diamonds, colored stones, pearls, and jewelry to its lab in Lucerne, Switzerland, without delay, extra cost, or additional customs formalities, the lab said in a statement. Called the Gübelin Shuttle,

http://www.jckonline.com/article/CA274486.html

Nitrogen or Not?

News | www.jckonline.com | Feb 1, 2001

General Electric, developer and owner of the high-pressure, high-temperature (HPHT) Pegasus process that turns brown Type IIa diamonds into white Bellataire diamonds, claims that Type IIa diamonds contain no nitrogen. But according to research carried out by the Gübelin Gem Lab in Lucerne,

http://www.jckonline.com/article/CA64654.html