GL Newsletter August 2015

Dear C.I.G. students and friends,

Just a reminder of the following upcoming events. I hope to see many of you during the first annual Vancouver Gem Show, August 14 – 16.

Please register for the fall C.I.G. Professional Development Courses soon as the number of participants is limited (see GEM 250 Advanced Gem Identification below).

IMPORTANT: Again I urge all Gem-A members to cast their vote in the upcoming election for Trustees. The choice is between a trade association headed by  “Seven Disgruntled Members”  (also read ISG Editorial) or candidates who will support the high educational standards  of Gem-A  and are qualified to run a modern UK professional association. Only one candidate is a Gem-A diploma holder; Ronnie Bauer FGA has never written a Gem-A examination!

Wolf Kuehn, F.G.A. (diploma holder since 1985), F.G.G.

Vancouver Gem & Mineral Show, August 14 – 16


Visit us a the C.I.G. (Canadian Institute of Gemmology) booth #32; books and small gem testing instruments will be on sale.

Location: Kitsilano Rink 2690 Larch St, Vancouver, BC

Friday, August 14th, 12:00-8pm
Saturday, August 15th, 10am-6pm
Sunday, August 16th, 10am-5pm

Adults: $7, Seniors/Students: $5

Children 12 and under free (with adults)

Please bring interesting gems and minerals (2 per visitor) and have them identified with our GL Gem Raman PL532 TEC while you wait and watch.


This course is an up-date course  for A.G. (C.I.G.) diploma holders and graduates of other schools and institutes.


  • Course Type: Combination of correspondence course and weekend/during week (2 1/2 days) workshop. C.I.G. DIAMOND GRADING certificate
  • Prerequisite: A.G. (C.I.G.) diploma or equivalent (please contact us)
  • Fee: $ 995 includes home study lessons (must be completed prior to workshop), grading projects with actual diamonds, study materials and exam fee (no HST) but does not include the textbook “Diamond Grading ABC: Handbook of Diamond Grading” by Pagel Theisen, 2007 (price $ 90)

In ten (10) assignments you learn the basic knowledge to buy, sell and evaluate diamonds effectively.

In five (5) practical sessions you grade diamonds for clarity, colour and cut (according to GIA and European (CIBJO) grading standards) including performance and device based approaches such as AGS (American Gem Society) ASET, Hearts & Arrows (Ideal Scope), Cut Advisor and others. Special procedures for assessing the quality of mounted diamonds will be shown.

Course Content: 1. Introduction to Diamond Grading 2. Determination of Colour Grades 3. Clarity Nomenclature and Grading 4. Cut and Proportions 5. Evaluation of Colour, Clarity and Cut 6. Diamond Grading Procedure 7. Representation of external and internal features 8. Practical Grading of Clarity, Colour and Cut 9.Proportionscope and Fancy Cuts 10. Grading Tools, Recutting, Diamond Imitations, HPHT Treatments, Synthetic Diamonds

IMPORTANT: The practical grading workshop must be taken during a C.I.G. scheduled class. Diamonds cannot be mailed out.

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

advan advan advan

GEM 250 Advanced Gem Identification

The following course is an up-date course  for A.G. (C.I.G.) diploma holders and graduates of other schools and institutes; it is recommended as an introduction to the use of advanced gem testing equipment.

In this advanced 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. Max 5 participants.

  • Fee: $ 995 includes comprehensive study guide and materials (copy of Gemstone Inclusion Library), use of lab equipment and study stones. Recommended text-book: Gemology by Peter Read. Download course flyer (PDF).
  • GEM 250 – 3: Mon – Thu, November 9 – 12, 9:30 a.m. – 4:30 p.m. RESERVED
  • GEM 250 – 4: Sat – Tue, November 14 – 17, 9:30 a.m. – 4:30 p.m. SPACE AVAILABLE
  • Location: Sandman Signature Hotel – Vancouver Airport, Richmond B.C. (special room rate).  Please register by October 15, 2015
  • To keep costs down no lunch or beverage services are offered, lunch break 12:30 – 1:30 p.m
  • Prerequisites: A.G. (C.I.G.) diploma or equivalent (please contact us)

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, synthetic CVD and HPHT grown and treated diamonds and many others. Gem enhancement techniques such as polymer impregnation (jadeite), heat-alteration, surface colour diffusion, irradiation, HPHT and glass filling are studied.

Hands-on exercises with our portable in-house developed GL Gem Spectrometer and GL Gem Raman PL532 TEC system. Practicing gemmologists may use this lab class to up-grade their skills.

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

GEM 270 GL Gem Spectrometer and Raman Workshop

This course is for current or future users of the GL Gem Spectrometer and GL Gem Raman PL532 system.Raman In Operation

  • Using PowerPoint presentations the development and use of advanced spectrometers is introduced
  • Learning step-by-step testing method for the GL Gem Spectrometer and use of the GLGemRaman software and searchable database.

Practical testing of a number of interesting gem materials by the participants under supervision of the workshop facilitator; most up-to-date information on synthetic diamonds including CVD, HPHT and irradiation treatments and their detection. Limited to 4. participants.
Prerequisite: previous practical experience with spectroscope/spectrometer and good understanding of advanced spectroscopy.

Facilitator: Wolf Kuehn, B.A., M.A., Dipl.oec, FGA, FGG

  • GEM 270-3 Friday, Nov 13 from 9:00 – 1:00 p.m. (4 hours) RESERVED
  • GEM 270-4 Friday, Nov 13 from 2:00 – 6:00 p.m. (4 hours) SPACE AVAILABLE

Sandman Signature Hotel – Vancouver Airport, Richmond B.C. (special room rate). Please register by October 15.

Fee: $ 295 (free for purchasers of the GL Gem Spectrometer or Raman PL532 TEC*); to keep costs down no lunch or beverage services are offered.

Please wait with travel arrangements until final confirmation.

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

*Participants who  will purchase the GL Gem Spectrometer or GL Gem Raman system within one month will receive a $ 295 refund/discount.


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

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Gemlab Research & Technology.