Many buyers work though several parts of the industry - learning to mine, taking gemology courses, studying with diamond cutters, etc. - before launching a career as a buyer.
Diamonds of lower quality in terms of color as well as diamond flaws and inclusions because older techniques could not detect imperfections as easily as modern gemology practices.
The Gemology Institute of America uses a scale of one to nine to rate the color of the stone.
All hail the new king of online gaming gemology: Bejeweled 2!
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