Gemstone Gathering

 

GIA's The 14th Gemstone Gathering June 2008

The subject of this gemstone gathering’s presentation is...

“The Microworld of Jade"

 

by GIA's Chief Gemologist, Mr. John Koivula

for an unforgettable journey into the “stone of heaven”

 

Mr. John Koivula, Chief Gemologist, GIA Carlsbad, California who is perhaps best known for his work with the late Dr. Gubelin in the creation of the Photoatlas of Inclusions in Gemstones series of books.

Mr. Koivula has an extensive gemological background ; he has authored and co-authored over 800 articles for a variety of trade and industry publications, and is responsible for early pioneering work with photomicrography and illumination techniques used with the microscope.

The charismatic John Koivula delivered a thoroughly enjoyable and energetic presentation focusing on how minute microscopic clues can help in the separation of heat treated and natural gems, additionally he demonstrated the importance of varied illumination techniques and viewing angles when studying inclusion scenes.

 

 

by GIA Thailand Campus : 02 237 9575 to 77

and GIA Laboratory Bangkok : 02 632 4090