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 http://www.git2014.com/index.php

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

GL Newsletter May 2014

logo21-150x150 From the editor

As we are approaching the busy months of this year just a few reminders:

There are few places left during our Spring 2014 PDP (Professional Development Program) at the Sandman Signature Hotel – Vancouver Airport, May 31 – June 3. More info here.

The program for the 11th International GeoRaman Conference (June 15 – 19) in St. Louis, MO USA has been published; download program (PDF file which contain links to abstracts).

Please read our abstract (PDF, 356 KB).

GL Gem Spectrometer and GL Gem Raman Workshops

For present and interested future users of our advanced gem testing instruments we offer a free 3-hour review and hands-on session during the Spring 2014 Workshops on Tuesday, June 3 from 2:00 – 5:00 p.m.; the workshop is limited to 5 participants. Please contact us at gemlab@cigem.ca to reserve your space.

We also have an advanced 3 1/2 hour workshop scheduled for Tuesday, June 3, 2014 from 6:00 – 9:30 p.m.; please register on-line by May 20.

GL Gem Raman PL 532 Upgrade

After successful testing of a protoype we have implemented the GL Gem Raman Band Pass Filter (GLBPF) for suppression of fluorescence in Raman mode. It consists of a holder with a dielectric filter which is inserted into the GL Gem Raman case when needed. This simple solution allows the upgrade of all GL Gem Raman units previously sold for a reasonable price (dielectric filters are not inexpensive!); all users will be contacted when the filter assemblies become available (in early June 2014).

The official introduction of the the upgraded GL Gem Raman PL532 TEC (which will be slightly lighter weighing less than 8 kgs) will take place at the GeoRaman Conference (June 15 – 19) in St. Louis, MO USA; as an official sponsor of this event we have a display booth and will be demonstrating the new GL Gem Raman PL532 TEC in the 2014 GeoRaman Exhibition Hall.

After band pass filter for fluorescence suppression

Band pass filters are used in more expensive commercial Raman systems in a number of applications. The introduction of a suitable band pass filter for suppression of fluorescence will greatly improve the detection of Raman signals when previously overwhelmed by fluorescence. We received surprisingly good results with spinels, rubies and sapphires, emeralds and other gemstones affected by fluorescence. In many cases valuable Raman information could be obtained to positively identify the sample in the RRUFF database. However, very strongly fluorescent materials such as synthetic flame fusion ruby could not be identified; for these materials a UV laser in a gated system will be necessary.

The filter assembly can also be used with other filters. As we are able to produce the filter assembly in larger quantities the price of the complete GL Gem Raman PL 532 TEC system has not changed and will be under US$ 8,500 (Can$ 9,300, EUR 6.200). More info about the GL Gem Raman PL532 here.

New Advisor to the GLR&T Team

We welcome J M Dereppe, Ph.D. (Professor Emeritus, Physical Chemistry Department), University of Louvain, Belgium to the Gemlab R&T Development and Support Team. Jean-Marie is running his own research lab and is an experienced spectroscopist who purchased the GL Gem Raman PL532 TEC last year; he is also our European contact person.

Jean-Marie’s work was was crucial in finding a solution to overcoming the fluorescence problems common in Raman spectroscopy. After testing a number of filters he presented me with the idea of a bandpass filter which we now include in all new GL Gem Raman units as the “GL Gem Raman Band Pass Filter (GLBPF) for suppression of fluorescence in Raman mode”.

Articles about Testing HPHT Reated and CVD Grown Diamonds

We were able to test a number of diamond samples and the work is still ongoing (and probablay will for a while). Until now there is no 100% answer as to the type or combination of treatments used on synthetic diamonds (either HPHT or CVD grown); as these materials will become more common in the near future scientist struggle to come up with solutions. As a start an excellent scientific book is by “Inga A. Dobrinets, Victor G. Vins, Alexander M. Zaitsev (2013) HPHT-treated Diamonds”; sample pages can be downloaded from here.

Personally I would be cautious with all devices claiming 100% reliability and repeatability based on a large reference base: only one sample which has not been properly identified will make the whole database useless.

I believe there will be several approaches in the future with analysis of photolouminescence features perhaps the most promising. In this context the PL feature of the GL Gem Raman PL532 will be very useful in future research; the state of the art will be presented during our poster session at the GeoRaman 2014 conference. Below one example of our findings:

Raman PL spectrum (room temp.) indicating HPHT treatment in synth. diamond

Raman PL spectrum (room temp.) indicating HPHT treatment in synth. diamond

The graph above left illustrates a synthetic HPHT treated diamond (non CVD) with a nitrogen-vacancy defect at 637 nm; it also shows the surpression of the 558, 566 and 576nm bands which usually indicate an untreated diamond if the 637 nm peak is missing as well.

Strong silicon-vacancy peak at about 737nm may indicate CVD (chemical vapour deposition) grown synthetic diamond; there are natural diamonds with similar features but they can be recognized by their inclusions. However, the detection of the SiV optical center at 736.6/736.9 nm SHOULD NOT be considered proof of CVD synthesis (see recent article in Gems & Gemology, Spring 2014); more research is necessary.

The analysis of Gr1 and SiV centres in CVD-grown yellow diamonds and the comparison with existing published data indicate that other impurities like Xe, Ni or Cr may produce other colours as well; see “Contributions to Gemology #14 (2014) New Generation of Synthetic Diamonds Reaches the Market, 41 – 55″ published by GRS Gemresearch Swisslab.

Exotic Gems, Volume 3 by Renee Newman

Exotic Gems Vol 3 How to Identify, Evaluate, Select and Care For Matrix Opal, Fire Agate , Blue Chalcedony, Rubellite, Indicolite, Paraiba and Other Tourmalines.

This book and other volumes can be purchased at our Gemlab Books on-line store.

I would like to thank Renee for the authographed copy she presented me during the last AGTA Gem Show in Tucson, Arizona; as always a solid work with lots of beautiful images.

 

CIGem News Spring 2014

ISSN 0846-3611 GEMMOLOGY CANADA – Wolf Kuehn, F.G.G., F.G.A., Editor

From the Editor:

Since my return from a very successful AGTA GemFair in Tucson, Arizona we have been busy shipping orders and answering questions about our courses and products. I will be present at the C.I.G. booth during the BC Gem & Mineral Show (see below).

BC Gem & Mineral Show, Abbotsford – April 11, 12 & 13

Visit us at the Ag-Rec Building, Central Fraser Valley Fairgrounds, 32470 – Haida Drive, Abbotsford, British Columbia

Mosasaurs

Petrified – Locked In Time

  • Friday: 10:00 am – 8:00 pm
  • Saturday: 10:00 am – 6:00 pm
  • Sunday: 10:00 am – 5:00 pm

Admission: Adults – $6.00, Students (6 – 17) – $2.00, Under 6 – Free

At the C.I.G. booth we have our full line of gem testing tools and several new titles of gem books on display; buy at the show and save on taxes and shipping costs.

We are also demonstrating the 2014 model of the GL Gem Raman PL532 TEC system and the GL Gem Spectrometer with an innovative attachment.

Please bring any gems or minerals for quick identification (even set in jewellery; max. 5 pieces per customer); we are particularly interested in jade, treated gemstones and diamonds of any kind (synthetic, coloured, HPHT, irradiated, etc).

Updated Webpages for Gemlab Research & Technology

Due to the increasing number of users around the world we have updated the GL R&T section of GEMOLOGY WORLD; you can reach it at www.gemlab.ws.

Cobalt doped filled Sapphire

Cobalt doped filled Sapphire

There are GL Gem Spectrometer users in 32 countries around the world; please go to the updated section with interesting links and sample spectra. GL Gem Spectrometer
Rapid Separation of Diamond, Moissanite and Cubic Zirconia

Rapid Separation of Diamond, Moissanite and Cubic Zirconia

The GL Gem Raman PL532 TEC is being used for scientific research in the Department of Earth and Environmental Sciences at the University of St Andrews, Scotland and at The Mineral Technology Center (CETEM) – a research institute of the Ministry of Science, Technology and Innovation (MCTI) in Rio de Janeiro, Brazil and by users in 15 countries around the world. GL Gem Raman PL532

Gemlab R&T Official Sponsor of 11th GeoRaman Conference

2014 GeoRaman Conference

In the show room will be demonstrating the GL Gem Raman PL532 with new features to surpress fluorescence and share up-to-date information about detection of natural, synthetic, HPHT and CVD grown diamonds and their treatments. The use of the GL Gem Spectrometer will also be demonstrated.

GL Gem Spectrometer and GL Gem Raman Workshops

For present and interested future users of our advanced gem testing instruments we offer a 3-hour review and hands-on session on Tuesday, June 3 from 2:00 – 5:00 p.m.; the workshop is limited to 5 participants. Please contact us at gemlab@cigem.ca to reserve your space.

We also have an advanced 3 1/2 hour workshop scheduled for Tuesday, June 3, 2014  from 6:00 – 9:30 p.m.; please register on-line.

GEM 250 Gem Identification II (Advanced)

In this course students will learn state-of-the-art techniques (including emstone magnetism, IR-VIS-NIR and Raman spectroscopy), etc. designed to identify confidently any gemstone encountered in the market place. Between 100 and 120 challenging gems including the most recent synthetics and treatments are available for testing. Practising gemmologists may use this lab class to up-grade their skills.

  • Prerequisite: “Gemmologist” certificate or similar gemmological qualification.
  • Fee: $ 995 ($ 200 exam fee for A.G. Diploma not included); comprehensive study guide, Gemstone Inclusion Library, use of lab equipment and study stones.
  • Date/Location: Sat – Tue, May 31 – June 3, 10:00 a.m. – 5:00 p.m., Sandman Signature Hotel – Vancouver Airport, Richmond B.C. (special room rate)

Day 1: Review of gem testing instruments; quick gem identification methods and practical work.

Day 2 and 3: Routine testing with microscope and selected gemmological tools to identify difficult gem materials loose and set in jewellery.

Day 4: Identification of challenging gem materials and their treatment; introduction to advanced identification techniques using the GLGemSpec and GL Gem Raman PL532 spectrometer.

Here a brief list of man-made gems in our study collection: Chatham, Kashan, Ramaura, Knischka, Lechleitner, Regency, Biron, Lenix, Gilson, Tairus rubies, sapphires, emeralds, alexandrite, opal, moissanite, CVD, synthetic diamonds and many others. Gem enhancement techniques such as heat-alteration, surface colour diffusion, irradiation, HPHT and glass filling are studied.

To register contact us at gemlab@cigem.ca or call: 604-530-8569

 

GL Newsletter October 2013

From the Editor

AGTA 2014

After travelling in Brazil for three weeks and giving presentations to various university groups including the Federal Police of Brazil during the “II Seminario Iberoamericano de Geologia Forense”(Brasilia, Oct. 2 -4) we are already  preparing for the next AGTA Gemfair Tucson, Jan. 4 – 9, 2014.

The GL Gem Raman PL532 TEC is now being used for scientific research at the University of St Andrews, Scotland (see below) and at The Mineral Technology Center (CETEM) – a research institute of the Ministry of Science, Technology and Innovation (MCTI) in Rio de Janeiro, Brazil.

 

Understanding Fluorescence 2013, August 31

I attended the one-day Professional Development Course at the Department of Earth and Environmental Sciences, University of St Andrews, Scotland; the workshop was part of a series of events associated with the UK Luminescence and ESR meeting and immediately followed it.

The course was targeted at gemmologists, valuers and jewellery professionals and all individuals interested in gems and minerals. It provided a unique opportunity to expand understanding and use of fluorescence in gemmology and other mineral sciences.

GL Gem Spectrometer reviewed in French Journal

An article about the GL Gem Spectrometer appeared in the French Revue de gemmologie AFG N 183 (2013) (PDF 1.7 MB, with permission by the author)

Developments for GL Gem Spectrometer and GL Gem Raman PL532

We are working on several projects exploring the PL (photoluminescence) features of the GL Gem Raman PL532 for detection of HPHT treatments in diamonds and colour enhancements of gemstones.

I highly recommend a recent publication HPHT-Treated Diamonds – by Springer; you can download the complete Chapter 2 on Diamonds Used for HPHT Treatment.


It provides an excellent overview of the types of diamonds including their atomic models and describes testing methods for coloured diamonds.

Of concern is the statement on page 16 that “HPHT-treated cape-yellow diamonds are also something to encounter within the gem diamond market” as confirmed during a workshop at the September Hong Kong Jewellery Show. Until now we assumed that the cape lines (which are easily detected in the GL Gem Spectrometer) indicated “untreated”.

For a limited time we offer again the GL Gem Raman PL532/Gem Spectrometer Combo (until October 31). We also have one GL Gem Raman PL532 TEC unit for sale in Brazil; please contact me for details.

Identification of Jadeite Treatments with the GL Gem Spectrometer

The light holder of the GL Gem Spectrometer can easily be removed and uses with external light sources; as the halogen and Xenon light have very similar emission spectrum normalized reference spectra can be used for comparison.

First turn light on and take a "reference" (lamp) spectrum

First turn light on and take a “reference” (lamp) spectrum without any sample

XenonSetup2

Remove the light holder and put some “blu-tack” to level the sample with the entrance port

Place the sample area over the entrance port

Place the sample area over the entrance port

XenonSetup4

Shine the GL Xenon Flashlight from above onto the sample and observe the spectral graph

If you see the 690 nm peak the jadeite is naturally coloured; if the 690nm peak is missing the jadeite is either dyed or treated. The Chelsea filter reaction may indicate presence of dye.

Identification of dyed jadeite (PDF) from The Journal of Gemmology, 2009, 31(5-8)

Jadeite Untreated Jadeite Treated

The GL Gem Raman PL532 is needed to confirm polymer impregnated jadeite.

Advanced Gem Identification

cig100This 4-day workshop is offered as part of the A.G. Professional Development Program (AG-PDP). Also recommended as an upgrade course for practising gemmologists.

Students will learn state-of-the-art techniques (including immersion-scope, gemstone magnetism, IR-VIS-NIR and Raman spectroscopy), etc. designed to identify confidently any gemstone encountered in the market place.

Between 100 and 120 challenging gems including the most recent synthetics and treatments are available for testing.

  • Fee: $ 995 includes comprehensive study guide, Gemstone Inclusion Library, use of lab equipment and study stones.
  • Date: Sat – Tue, Nov 16 – 19, 10 a.m. – 4:30 p.m., Vancoucer (YVR Airport Hotel), Richmond, B.C.
  • Please register by October 17, 2013

Here a brief list of man-made gems in our study collection: Chatham, Kashan, Ramaura, Knischka, Lechleitner, Regency, Biron, Lenix, Gilson, Tairus rubies, sapphires, emeralds, alexandrite, opal, moissanite, CVD, synthetic diamonds and many others. Gem enhancement techniques such as heat-alteration, surface colour diffusion, irradiation, HPHT and glass filling are studied.

Day 1: Review of gem testing instruments; introduction to advanced identification techniques using the GLGemSpec and GL Gem Raman PL532 spectrometer.

Day 2 and 3: Routine testing with microscope and selected gemmological tools to identify difficult gem materials loose and set in jewellery.

Day 4: Identification of challenging gem materials and their treatments.

GL Gem Raman Workshop

Gemlab LogoThis course is recommended for future users of the GL Gem Raman PL532 system.

  • Using PowerPoint presentations the development and use of Raman spectrometers is introduced.
  • Procedure of proper calibration with Laser Glasses (190-548nm); learning step-by-step testing method with GLGemRaman software and searchable database.
  • Practical testing of a number of interesting gem materials by the participants under supervision of the workshop facilitator.

Fee: $ 295 (limited to 4 participants. To register on-line go here.

Date: Fri, Nov 15 from 6:00 – 10:00 p.m. (4 hours), Vancoucer (YVR Airport Hotel), Richmond, B.C. Please register by October 17, 2013

Participants who purchase a GL Gem Raman PL532 within one month after the workshop will receive a $ 295 discount.

We reserve the right to cancel courses if there is insufficient enrolment; upon return of all course materials students will receive a full refund for the tuition paid but no other compensation can be offered. Please wait with travel arrangements until final confirmation.

View/Download and read carefully our refund policy (PDF).

11th International GeoRaman Conference

“The 11th International GeoRaman conference in St. Louis, June 15-19, 2014 will focus on two major aspects of laser Raman spectroscopy: (1) The most advanced technologies and instrumentation, from laboratories to a wide variety of field applications, e.g., industrial and security monitoring, geo-fields, deep ocean, and on other planets; (2) The newest applications in studying inorganic, organic, and bio-genetic materials in Earth Sciences, Planetary Sciences, Environmental Science, Forensic Science, Archaeology and Archaeometry, Gemology, and Astrobiology.”

During the Xth GeoRaman in Nancy France in June 2012 several gemmology related issues were covered and will be further addressed in St. Louis.

_________

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

© 2013 Gemlab Research & Technology, Vancouver, Canada

The name and logo GEMLAB GROUP is a registered trade mark (Registration # TMA407372 with the CIPO)

Gemlab Research & Technology.

CIGem News Spring 2013

ISSN 0846-3611 GEMMOLOGY CANADA

From the Editor:

Since my return from a very successful AGTA GemFair in Tucson, Arizona we have been busy shipping orders and answering questions about our courses and products. There are several activities scheduled for April and May; see below. We will be attending the Las Vegas Antique Jewelry & Watch Show at the Paris Las Vegas Hotel, May 30 – June 2, 2013. You will find more information in the next GL Newsletter.

BC Gem & Mineral Show, Abbotsford – April 12, 13 & 14

Visit us at the Ag-Rec Building, Central Fraser Valley Fairgrounds, 32470 – Haida Drive, Abbotsford, British Columbia

BC Gem Show 2013

Colourful World of Minerals

  • Friday: 10:00 am – 8:00 pm

  • Saturday: 10:00 am – 6:00 pm

  • Sunday: 10:00 am – 5:00 pm

Admission: Adults – $6.00, Students (6 – 17) – $2.00, Under 6 – Free

At the C.I.G. booth we have our full line of gem testing tools and several new titles of gem books on display; buy at the show and save on taxes and shipping costs. The new Handbook of Gemmology DVD will be available for sale.

We are also demonstrating the new GL Gem Raman PL532 TEC system and the GL Gem Spectrometer with an innovative attachment. There is a special show price for the GL Gem Raman PL532/Gem Spectrometer Combo system available.

Please bring any gems or minerals for quick identification (even set in jewellery; max. 5 pieces per customer); we are particularly interested in jade, treated gemstones and diamonds of any kind (synthetic, coloured, HPHT, irradiated, etc).

We also have for sale a used (but in perfect working condition) Kyowa Zoom Stereo Trinocular Microscope with dark field attachment; asking price: SORRY ALREADY SOLD.

Kyowa SDZ The optical quality of the Kyowa Stereo Zoom microscopes is well established. The highly corrected optical system is a parfocal twin zooming design with objectives inclined at 12 degrees.

The SDZ head has a zooming range of 0.7x to 4.5x which can be extended by using auxillary lenses and 10x, 15x, 20x wide field eyepieces. The wide field image is sharp and erect; no refocusing is required throughout the zoom magnification range.

The trinocular head is designed for use with digital imaging systems. A push/pull lever transfers the left side image to the photo tube. The right side image is retained and can be viewed simultaneously with photography.

Far East Gem Travel 2012

Mandalay markets

I posted several YouTube videos with highlights of my trip to Myanmar (Burma) and the GIT 2012 Post Conference Tour to Chanthaburi (Thailand) and Pailin (Cambodia).

Go to Myanmar, Thailand, Cambodia Gem Travel.

The GIT 2012 website has a large photo gallery and the eProceedings from the 3rd International Gem and Jewelry Conference can be downloaded; the latter provides the practising gemmologist with the latest information about current issues in the jewellery trade.

The Handbook of Gemmology (eBook) Released

Handbook-of-Gemmology-Book

Features include:

  • State of the art ‘Flipping Book’ technology (Win/Mac Versions)
  • Powerful Search Engine
  • Post-its
  • Highlighting
  • Interactive Table of Contents
  • Zoom in/Zoom out
  • Thumbnail Images
  • Full Index & Printable PDF Index

Geoff Dominy will be at the C.I.G. booth for a “Meet the Author” event on Saturday, April 13 during the BC Gem & Mineral Show in Abbotsford.

Covering all aspects of the science of gemmology and gem identification this innovative and interactive e-Book consists of 654 digitized pages and over 700 colour photographs, diagrams and illustrations in a DVD format.

A must buy for any gemmologist, student or jeweller who demands the latest technology and the most up-to-date information.

Available in .exe (Windows), .app (Mac), ePUB or Mobi file formats. Purchase your DVD ($ 49.95) on-line at Gemlab Books & Instruments.

GEM 250 Gem Identification II (Advanced)

In this course students will learn state-of-the-art techniques (including immersion-scope, gemstone magnetism, IR-VIS-NIR and Raman spectroscopy), etc. designed to identify confidently any gemstone encountered in the market place.

Between 100 and 120 challenging gems including the most recent synthetics and treatments are available for testing.

cig100

  • Course Type: Four-day/week-end practical class in major cities. Certificate after written and practical exam.
  • Prerequisite: “Gemmologist” certificate or similar gemmological qualification.
  • Fee: $ 995 ($ 200 exam fee for A.G. Diploma not included); comprehensive study guide, Gemstone Inclusion Library, use of lab equipment and study stones. Recommended optional text: Handbook of Gem Identification by Liddicoat (12th ed.)
  • Date/Location: Sat – Tue, May 18 – 21, 10 a.m. – 4:30 p.m., Vancoucer (YVR) Airport Hotel (special room rate), Richmond, B.C.); spring exam day: Wednesday, May 22

Here a brief list of man-made gems in our study collection: Chatham, Kashan, Ramaura, Knischka, Lechleitner, Regency, Biron, Lenix, Gilson, Tairus rubies, sapphires, emeralds, alexandrite, opal, moissanite, CVD, synthetic diamonds and many others. Gem enhancement techniques such as heat-alteration, surface colour diffusion, irradiation, HPHT and glass filling are studied. Hands-on exercises with our in-house developed GL Gem Spectrometer and GL Gem Raman system. Practising gemmologists may use this lab class to up-grade their skills.

Day 1: Review of gem testing instruments; introduction to advanced identification techniques using the GLGemSpec and GL Gem Raman PL532 spectrometer.

Day 2 and 3: Routine testing with microscope and selected gemmological tools to identify difficult gem materials loose and set in jewellery.

Day 4: Identification of challenging gem materials and their treatment with guest speaker covering the following diamond topics:

Diamond Types, Causes of Colour in Natural Diamonds, Chameleon Diamonds, HPHT-grown Diamonds, CVD-grown Diamonds, Testing and Identification Methods for Lab-grown Diamonds (UV lamp, microscope, UV-VIS-NIR, FTIR, Raman and PL spectrometers, XRF, etc), Clarity Treatments (Fracture Filling, Traditional Lasering, KM Laser Drilling), Colour Treatments (Coating, Irradiation, Annealing, HPHT, Combination Treatments)

Register on-line here.

For more Info please call: 604-530-8569

GEM 370 GL Gem Raman Workshop

  • Using PowerPoint presentations the development and use of Raman spectrometers is introduced.
  • Procedure of proper calibration with Laser Glasses (190-548nm); learning step-by-step testing method with GLGemRaman software and searchable database.
  • Practical testing of a number of interesting gem materials by the participants under supervision of the workshop facilitator
  • Presenter: Wolf Kuehn, B.A., M.A., Dipl.oec, FGA, FGG
logo21-150x150

GEM 360-1 Sat, May 18 from 1:00 – 4:00 p.m. (3 hours)

Location: Vancouver (YVR) Airport Hotel, Richmond B.C., Canada

Fee: $ 295 ; limited to 5 participants. To register on-line go here.

Participants who purchase a GL Gem Raman PL532 system within one month after the workshop will receive a $ 295 discount.

To Register, please call: 604-530-8569

We reserve the right to cancel courses if there is insufficient enrolment; upon return of all course materials students will receive a full refund for the tuition paid but no other compensation can be offered. Please wait with travel arrangements until final confirmation.

View/Download and read carefully our refund policy (PDF).

CGL – Canadian Gemological Laboratory offering Courses

Vancouver based CGL has released their Spring 2013 schedule for one-day workshops covering several gemmological topics and rough diamonds; go to their website for further information.

Participants in the ADVANCED PROGRAM – DIAMONDS April 26 (Friday) and May 4th (Saturday) and COLOURED STONES April 27 (Saturday) and May 3rd (Friday) have an opportunity to work with the GL Gem Spectrometer and the GL Gem Raman PL532 systems; other advanced testing instruments are demonstrated as well.

SPAM Mail and other Nuisances

Are you receiving messages like the following:

Hi, I am here in Tanzania with Tones of gemstone names Felisper (Ruby type). Will you kindly direct to the possible buyer!
We are the distributors for industrial Olympus, and othe prime brands in Colombia, we know that many of our customers will be interested in 
your products, we would like to be distributors in Colombia of your products.

You probably are and you are not alone. We receive dozens every day as it is easy to figure out the possible e-mail accounts for a particular domain. And there is no way to stop it even with an elaborate SPAM filter (suggestions are welcome). We are also being attacked by silent/hoax and/or soliciting phone and fax calls as people can use Skype and other means to reach us from anywhere in the world for free.

As a consequence we are sometimes unable to answer our phone; we have implemented an answering service asking you to leave your name and a message and we will call you back as soon as possible. We apologize for this inconvenience.

The Canadian Institute of Gemmology is a member of the World Gem Society.

For a nominal fee you can access a variety of resources available on-line.