Recently the De Beers Institute of Diamonds examined a very special gemstone. The video released by the company shows a diamond inside a cavity made of diamond itself!
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The 0.329-carat, D-colored, IaAB-type gemstone has an internal cavity that contains a smaller diamond, embedded but free to move.
According to the research team that was lucky enough to study the gem, the original “core” consists of a good quality diamond. The subsequent fibrous and probably poor layer, however, had an additional “outer coating” of growing gem-quality crystal. At some point in its journey to the earth’s surface, the poor-quality layer was eroded away, leaving only the better-quality material undamaged.
