The 10 Most Important Gemstone Discoveries of the Past 150 Years

Over the course of JCK’s century and a half–long history, the gem trade has blossomed into a $10 billion business. We chronicle the most important developments in a world gone mad for hue.   Tucson When mineral dealers began gravitating to this Arizona desert city in the 1950s, they couldn’t have known that within decades, it would grow into the world’s biggest gemstone marketplace, its growth prompting the 1981 formation of the Dallas-based American Gem Trade Association (AGTA), which helped provide structure and ethics to what had long been an unruly business. “A lot of jewelers don’t have time or expertise to travel around the world buying gems,” says Doug Hucker, CEO of AGTA. “When Tucson came around, colored gems became accepted. There was a ready marketplace an

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