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Post Info TOPIC: Sitting in front of a microscope

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Sitting in front of a microscope

Sitting in front of a microscope at the Gemological Institute of America (GIA) in 2020, Evan Smith carefully stretched some rubber gloves over his fingers, and peered into the instrument's lenses. Beneath was a diamond worth almost as much as a small country – about the size of a walnut, with 124 carats of wonderous brilliance.  


อ่านต่อได้ที่ โรงเรียนวัดนาขุนแสน
สาระน่ารู้   เครื่องดื่มแอลกอฮอล์


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