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Tony Diniz from "Game of Stones" stars in the Discovery Channel reality docu-series.

Tony Diniz is a gem stone expert lapidary and colorful raconteur who is a member of Dan Kogen's tight and trustworthy team at Gem Guys, Inc. Tony is the broker, the money man, who has an acute understanding of the ups and downs of the rare stone industry.

Gemstones have literally shaped Tony's life. Hailing from Governador Valadares, the gemstone capital of Brazil, renowned for gemstone mining and trading, Tony is the eldest of five brothers. Forced to become the head of his household at very young age, Tony credits this early responsibility as the driving force behind his determination to succeed.

Learning to speak English in America, Tony returned home to work as an English teacher. Many of his first pupils worked within the gemstone industry and Tony soon became well-known within the trade. However, unless you have family connections or are a wealthy investor, getting a foot in the door in the gemstone industry is tough, especially in Brazil.

Through his teaching work, Tony found out that an American gemstone company was looking to open an office in Governador Valadares and that one of their founding partners was coming to town. Tony found out the hotel they were staying in and waited there until the early hours of the morning to meet them. The rest, as they say, is history…

The gemstone executive had already heard of Tony from the industry professionals he had taught and was very impressed with Tony's tenacity and ambition. Tony was initially given a job slicing gemstones and such was his aptitude, that within two years he had worked his way up to senior gemstone buyer.

Tony was soon able to set up his own buying office in Brazil, and within the next decade had also opened offices in Thailand. He now shares his gem expertise on two dedicated jewelry home shopping channels in Europe, Rocks & Co. and Juwelo. Apart from traveling extensively to gem markets and mining centers in Africa, Asia, North America and South America, Tony is also a member of the ICA (International Colored Gemstone Association), an organization whose members include the top gemstone miners, cutters and dealers throughout the world.


Hometown: Governador Valadares, Brazil

"Game of Stones" (TV show) cast Rare Stone Hunter Chases New Finds in 'Game of Stones' — Premiering Friday, February 28, the new Discovery Channel series follows an extreme gem hunter as he goes to the most dangerous and lawless places on Earth, racing the clock to beat his competitors. Read more...

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