Must read. Insightful report by the researchers at GIA. Before cutting and polishing, diamonds have highly variable surface features rarely, if ever, seen by the jewelry wearer. These features can tell an interesting story of diamond's geological history deep within Earth----both in the mantle rocks where diamonds grew and during subsequent volcanic transport.
Useful link:
https://www.gia.edu/gems-gemology/spring-2020-diamond-dissolution
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