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Author
Publisher
Balzer + Bray, an Imprint of HarperCollinsPublishers
Pub. Date
[2018]
Language
English
Description
"Before a diamond is a gem, it's a common gray rock called graphite. Through an intense trial of heat and pressure, it changes into one of the most valuable stones in the world. Before Tracy Hall was an inventor, he was a boy--born into poverty, bullied by peers, forced to work at an early age. However, through education and experimentation, he became one of the brightest innovators of the twentieth century, eventually building a revolutionary machine...
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