GL Newsletter July 2014

Bonne Terre Mine

Bonne Terre Mine

From the editor

One of the highlights of the GeoRaman conference was the field trip “Historic Lead Mining in Missouri” to the Bonne Terre Mine and Museum; one would expect the typical abandoned lead mine instead we visited the world’s largest fresh water dive resort!

We took a guided boat tour on the “Billion Gallon Lake” (the world’s largest subterranean lake) with its crystal clear water, and spectacular views of Underground Flower Gardens, Calcite Falls, and ancient Abandoned Mining Tools and Rail Systems.

I want to thank the organizers and helpers of GeoRaman 2014 for a memorable week in St. Louis, MO.

Please note that I will be away from the office from August 24 until September 17 while travelling in Europe.

For November several conferences/workshops are planned for Brazil including a one week seminar/field trip to the amethyst mines in Rio Grande do Sul (Porto Alegre). Please contact me regarding these events.

11th International GeoRaman Conference

GL R&T was a sponsor of this well attended conference and had a display booth demonstrating the GL Gem Raman PL532 TEC and the GL Gem Spectrometers. Several researchers were impressed by their performance and versatility and are considering to purchase the Raman unit as a teaching instrument in geoscience classes.

Our poster “Raman and Photoluminescence Spectroscopy in Mineral Identification (PDF, 856 KB)” for GeoRaman 2014 was well received; the full program (PDF) with links to abstracts can be accessed here.

Of particular interest were the following contributions:

Study of the Composition of Amphiboles in the Tremolite — Ferro-Actinolite Series by Micro-Raman and SEM-EDXS (PDF) by researchers of the University of Parma, Italy, Physics and Earth Sciences Department. Several co-authors dropped by the GL R&T booth and explained their findings with a sample of nephrite using the extended range of GL Gem Raman PL 532.

Machine Learning Tools for Mineral Recognition and Classification from Raman Spectroscopy (PDF) by researchers from the School of Computer Science, University of Massachusetts, USA

Identification of CVD Synthetic Gem Diamond Using Raman Spectroscopy (PDF) by W. Wang, GIA, New York, USA

A special session in the Washington University’s Imaging lab was offered to a small group of participants. Go to GLGemRaman Facebook Photo gallery for more information.

The next GeoRaman XII will be held in Novosibirsk, Russia in 2016.

GL R&T Bronze Sponsor at the 4th International Gem and Jewelery Conference (GIT 2014 )

GIT2014 We are getting ready for the next conference.

GLR&T is Official Sponsor with an exhibition booth at the 4th International Gem and Jewelry Conference in Chiang Mai, Thailand Dec. 8 – 9, 2014

More info

GL Gem Raman PL 532 Demo Unit FOR SALE

We have a GL Gem Raman PL 532 demo unit (without TEC) for sale. This instrument with its extended range has been upgraded and equipped with the GLBPF (see band-pass filter upgrade) and is ideal for a small laboratory or as a teaching instrument in a college or university.

American Cut the First 100 years

American Cut We received from the GIA Bookstore a complementary copy of this excellent treatise by Al Gilbertson, G.G.

“Have you ever looked at a beautifully designed and finely crafted piece of antique jewelry and wondered why the diamonds look so different than the ones in modern jewelry?”


This book chronicles the evolution of what we refer to as the Ideal Cut from its earliest beginnings. It is still available from Amazon.

GEM 250 Workshops scheduled for September

This advanced workshop will be offered in Nanaimo, BC from Saturday – Tuesday, September 27 – 30.

Students in the Fine Jewellery Expert (F.J.E.) Program can complete their practical course-work for GEM 150 Gem Identification I; please contact us at 604-530-8569 for more information.

The advanced course GEM 250 will cover the practice and use of the GL Gem Spectrometer and the GL Gem Raman PL 532.

For present and future users we recommend the evening workshop GEM 270.


Wolf Kuehn, B.A., M.A., Dipl.oec, F.G.A., F.G.G. – GLR&T Project Manager

© 2014 Gemlab Research & Technology, Vancouver, Canada