Educating the industry on current pricing trends and gem treatments.

Gemworld International offers education classes developed and taught by Çiğdem Lüle, PhD, FGA, GIA GG. The aim of these hands-on courses is to provide practical knowledge specific to gem market pricing and identification challenges. The programs are designed for practicing gemologists, appraisers and industry professionals that buy, sell and appraise gemstones.

In addition to the continuing education courses, Gemworld also offers individualized corporate training programs tailored to the specific objectives of the client. These programs can vary from one-to-one practical classes, to corporate staff training in areas including gemology, gem identification, take-in procedures and jewelry product knowledge.

Emerald Treatments and Pricing Workshop


This half day hands-on workshop focuses on commonly seen emerald treatments in today's market. PowerPoint presentation will cover detailed information on gemology of emerald, identification issues and the modern laboratory methods to identify the fillers.

 Attendees will examine emeralds treated by various methods and learn the practical techniques used in the field to recognize them. The degree to which an emerald has been enhanced is one of the major considerations when accurately pricing these popular gems. Tips regarding how to estimate the treatment level are also presented.

Value factors such as color, clarity and transparency are discussed based on the GemGuide pricing system. Emerald specimens have been specifically treated for this program to illustrate the common treatment types and levels of enhancement encountered in the market.

Corundum Treatments and Pricing Workshop


This class is an intense one-day workshop on corundum treatments and pricing. Heating and other methods used to enhance the appearance of corundum are having a profound effect on the market.(Read More)

The sale of treated corundum has dramatically increased the supply of products sold as ruby and sapphire. Accurately pricing corundum requires the professional gemologist to distinguish not only between treated and natural, but also between the various treatments encountered in today’s global market.

The workshop is designed to reconcile the pricing of rubies and sapphires by specific treatment type. Participants will examine a variety of natural and treated ruby and sapphire followed by a presentation concerning pricing considerations. The hands-on session is supported by a PowerPoint presentation featuring high quality images of certain characteristics that reveal if and how the stones have been enhanced.

Christopher Smith, President of the American Gemological Laboratories, is the scientific adviser of this program.

Cultured Pearls and Pricing Workshop


Cultured pearls are one of the fastest growing sectors in the gem trade. Many varieties of Chinese freshwater pearls have earned widespread consumer appeal across the global market. (Read More)

However, visual similarity of these pearls to the once dominant seawater varieties like akoya and south seas have created some challenges for buyers, sellers and appraisal professionals whose responsibility is to accurately grade and price pearl products for their clients.

Today, cultured pearls are produced in an array of colors, shapes and sizes. Yet the standard remains the round to near round white products. Although visually similar, beyond appearance these products share little in common. Market availability, surface quality and of course price differ greatly from variety to variety as well as among pearls of the same variety. Accurately pricing cultured pearls requires the professional gemologist to distinguish not only between types, but also to correctly assess quality and shape factors within the same variety.

In this workshop, participants will examine and grade a variety of cultured pearls followed by a presentation concerning common enhancements and pricing considerations. The hands-on session is supported by a PowerPoint presentation featuring high quality images of certain characteristics useful for assessing overall grade.

Colored Stone Grading and Pricing


This 4 hour workshop explores the relevant considerations when examining the color, clarity, cut and carat weight of a colored gemstone specifically for the purpose of estimating its value. (Read More)

Color grading is presented following the new World of Color nomenclature and based on the international standard of the Munsell system. In this course, participants will examine and grade a variety of colored stones. The hands-on session is supported by a PowerPoint presentation featuring high quality images of specific quality factors that establish the overall grade.

The value of a colored stone is dependent on a number of factors both internal and external to the gem. As quality factors are discussed in this course, it will be done from the perspective of the identification and classification of specific traits as they relate to value. In 1982, Gemworld International developed a system for grading colored stones within the context of trade relevant terminology (i.e. Commercial, Good, Fine and Extra Fine). Today its 1 to 10 scale is an industry standard.

Gemworld International, Inc. reserves the right to cancel due to low enrollment or other causes beyond our control. Should a class be cancelled, a full 100% refund will be given to you.

At checkout enter code “Group Discount” to receive 10% discount on 3 or more Classes.

Upcoming Classes

Corundum Treatments and Pricing Workshop – Houston, TX - Feb 26

February 26, 2018
9:00 am — 4:00 pm
A full day hands on workshop working with 150 ruby and sapphire samples. This class is designed for practicing gemologists and requires knowledge of inclusions and working with a gemological microscope. Register Now…

Emerald Treatments and Pricing Workshop – Houston, TX - Feb 27

February 27, 2018
9:00 am — 1:00 pm
Half day hands on program working with treated and natural emerald specimens with pricing information. The class is taught by Dr. Cigdem Lule. Register Now…

Colored Stone Grading and Pricing Workshop – Houston, TX - Feb 27

February 27, 2018
2:00 pm — 6:00 pm
Half day program exploring the color, clarity, cut and carat weight of a colored gemstone specifically for the purpose of estimating its value. Participants will examine, grade and value a variety of colored stones. Register Now…

Cultured Pearls and Pricing Workshop - Houston, TX - Feb 28

February 28, 2018
9:00 am — 1:00 pm
In this workshop, participants will examine and grade a variety of cultured pearls followed by a presentation concerning common enhancements and pricing considerations. The hands-on session is supported by a PowerPoint presentation featuring high quality…

Corundum Treatments and Pricing Workshop – Troy, MI - Mar 19

March 19, 2018
9:00 am — 4:00 pm
A full day hands on workshop working with 150 ruby and sapphire samples. This class is designed for practicing gemologists and requires knowledge of inclusions and working with a gemological microscope. Register Now…

Emerald Treatments and Pricing Workshop – Troy, MI - Mar 20

March 20, 2018
9:00 am — 1:00 pm
Half day hands on program working with treated and natural emerald specimens with pricing information. The class is taught by Dr. Cigdem Lule. Register Now…

Colored Stone Grading and Pricing Workshop – Troy, MI - Mar 20

March 20, 2018
2:00 pm — 6:00 pm
Half day program exploring the color, clarity, cut and carat weight of a colored gemstone specifically for the purpose of estimating its value. Participants will examine, grade and value a variety of colored stones. Register Now…

Corundum Treatments and Pricing Workshop – Glenview, IL - Mar 26

March 26, 2018
9:00 am — 4:00 pm
A full day hands on workshop working with 150 ruby and sapphire samples. This class is designed for practicing gemologists and requires knowledge of inclusions and working with a gemological microscope. Register Now…

Emerald Treatments and Pricing Workshop – Glenview, IL - Mar 27

March 27, 2018
9:00 am — 1:00 pm
Half day hands on program working with treated and natural emerald specimens with pricing information. The class is taught by Dr. Cigdem Lule. Register Now…

Colored Stone Grading and Pricing Workshop – Glenview, IL - Mar 27

March 27, 2018
2:00 pm — 6:00 pm
Half day program exploring the color, clarity, cut and carat weight of a colored gemstone specifically for the purpose of estimating its value. Participants will examine, grade and value a variety of colored stones. Register Now…

Cultured Pearls and Pricing Workshop - Glenview, IL - Mar 28

March 28, 2018
9:00 am — 1:00 pm
In this workshop, participants will examine and grade a variety of cultured pearls followed by a presentation concerning common enhancements and pricing considerations. The hands-on session is supported by a PowerPoint presentation featuring high quality…

Corundum Treatments and Pricing Workshop – McLean, VA - May 21

May 21, 2018
9:00 am — 4:00 pm
A full day hands on workshop working with 150 ruby and sapphire samples. This class is designed for practicing gemologists and requires knowledge of inclusions and working with a gemological microscope. Register Now…

Emerald Treatments and Pricing Workshop – McLean, VA - May 22

May 22, 2018
9:00 am — 1:00 pm
Half day hands on program working with treated and natural emerald specimens with pricing information. The class is taught by Dr. Cigdem Lule. Register Now…

Colored Stone Grading and Pricing Workshop – McLean, VA - May 22

May 22, 2018
2:00 pm — 6:00 pm
Half day program exploring the color, clarity, cut and carat weight of a colored gemstone specifically for the purpose of estimating its value. Participants will examine, grade and value a variety of colored stones. Register Now…

Corundum Treatments and Pricing Workshop – Glenview, IL - Sep 10

September 10, 2018
9:00 am — 4:00 pm
A full day hands on workshop working with 150 ruby and sapphire samples. This class is designed for practicing gemologists and requires knowledge of inclusions and working with a gemological microscope. Register Now…

Emerald Treatments and Pricing Workshop – Glenview, IL - Sep 11

September 11, 2018
9:00 am — 1:00 pm
Half day hands on program working with treated and natural emerald specimens with pricing information. The class is taught by Dr. Cigdem Lule. Register Now…

Colored Stone Grading and Pricing Workshop – Glenview, IL - Sep 11

September 11, 2018
2:00 pm — 6:00 pm
Half day program exploring the color, clarity, cut and carat weight of a colored gemstone specifically for the purpose of estimating its value. Participants will examine, grade and value a variety of colored stones. Register Now…

Cultured Pearls and Pricing Workshop - Glenview, IL - Sep 12

September 12, 2018
9:00 am — 1:00 pm
In this workshop, participants will examine and grade a variety of cultured pearls followed by a presentation concerning common enhancements and pricing considerations. The hands-on session is supported by a PowerPoint presentation featuring high quality…