Advanced Gemmology Seminars at IJL

At a Glance

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What do I earn?

A GIA Letter of Attendance

Where are the Seminars held?

At the International Jewellery London trade Show. You can expand your knowledge and skills while you visit the show and network.

Who are the Seminars for

Anyone who has diamond grading and/or gem identification skills and would like to further their knowledge of gemmology.

Identifying Synthetic Diamonds

Sunday Aug 31
3 Hours, 10:30am-1:30pm


Through a combination of lecture and hands-on practice with a microscope, you'll learn how to identify HPHT-grown synthetic diamonds and separate them from natural diamonds.
You'll also gain greater insight into the identification of CVD-grown synthetic diamond.
You will learn how to easily separate synthetic moissanite and synthetic cubic zirconia from diamond.
Previous gemmological training and/or experience recommended.

Identifying Diamond Treatments

Sunday Aug 31
3 Hours, 2:30pm-5:30pm


Learn about various diamond treatments, including HPHT, fracture filling and irradiation and how to identify them. Then apply the theory by practising with treated stones and gain hands-on experience under the supervision of an experienced GIA instructor.
Previous diamond grading experience required.

Advanced Diamond Grading

Monday Sept 1
3 Hours, 2:30pm-5:30pm


Learn advanced diamond grading techniques to overcome the challenges of grading certain round brilliant cut stones, marquises, pears, ovals, and more. Practice colour grading using master sets and fancy-shaped diamonds. Gain the confidence to accept more demanding grading business.
Learn how the right borderline calls make better buying decisions.
The Advanced Diamond Grading Lab is a class strongly recommended to people with previous diamond grading training or experience.

Identifying Ruby, Sapphire, Emerald

Tuesday Sept 2
6 Hours, 10:30am-5:30pm


Become up-to-date on rubies, sapphires, and emeralds, in just one day. Learn about new ruby synthetics, the latest treatments (including fracture filling), and use our lab equipment to get an up-close look at rubies from new sources.
Learn how to detect treated sapphires and synthetics, and the importance of treatment disclosure. And receive up-to-date information on emerald treatments and synthetics with a highly challenging lab to test your skills.
The Identifying Ruby, Sapphire, Emeralds Lab is a class strongly recommended to people with previous Gem Identification and Coloured Stone Grading experience.

Gem Treatments Update

Wednesday Sept 3
3 Hours, 10:30am-1:30pm


Through a combination of instructor presentations and by practising with stones, you will gain insight on various treatments seen in the trade today.
You will learn how to identify whether the stone is treated and differentiate between treatments.
Previous gemmological education recommended.

Prior enrolment is necessary for all seminars.

If you require any further information on these seminars, please contact GIA London directly.