Live Online Seminar

Advanced Colored Stones Country of Origin Seminar

Country of origin determination is a pressing issue in the colored gemstone industry. Certain origins can add extra value to the stones. This webinar is dedicated for the complexity of this issue and how GIA’s gemologists make their determination. Courtesy: William Larson, Pala International.

This two-day live online seminar will provide a comprehensive and in-depth discussion of country of origin determination for many colored gems including ruby, sapphire, emerald, spinel and alexandrite.  

Participants will be guided by GIA researchers with expert knowledge of the methods used by GIA laboratories to determine country of origin for many colored stones. Learn from illustrations, images, video and live demonstrations that let you see exactly what our experts see as they examine a variety of colored stones under a microscope. Attendees will have the opportunity to interact with the instructor and will receive digital reference material.

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The number of attendees will be limited to ensure the best experience for attendees.

Topics include:

  • The importance of country of origin determination

  • How GIA determines colored gemstone country of origin, including the GIA field gemology program and the building of an origin reference collection

  • Global colored gemstone deposits

  • Instrumentation used in country of origin determination

  • Country of origin determination of ruby, sapphire and emerald, spinel, alexandrite and other colored gemstones


Each online seminar consists of multiple sessions over two days from 8 a.m. - 4 p.m. (Pacific Time)

New dates and locations may be added throughout the year.

  • June 16-17; Researchers: Aaron Palke and Wim Vertriest; Instructor: To Be Announced

This live seminar will be delivered through an online learning platform.


$995 USD


Please complete the online registration form. You will be provided information about how to access the platform after your registration is confirmed.

GIA’s continuing education offerings are considered avocational or recreational in nature and are not intended to prepare individuals for entry-level employment. They are non-credit bearing and do not lead to a GIA academic credential. They are not eligible for state or federal student financial aid programs and do not fall under the approval of the Accrediting Commission of Career Schools and Colleges (ACCSC) or the Distance Education Accrediting Commission (DEAC).