Donald Clark, CSM
2015 Clark Scholarship

...Donald Clark, CSM, posing with some Quartz The International Gem Society (“IGS”) was founded by Donald Clark, CSM with the mission to improve people’s access to information about...

About the International Gem Society (IGS)

...gemstones. Come join our community! About the Founder and Owners Donald Clark, CSM founded the International Gem Society in 1998. Donald started in the gem and jewelry industry in 1976....

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