I joked about it last year[0], but before going for isotopically pure diamond they first have to make them single-crystal, the grain boundaries are worse than i

I joked about it last year[0], but before going for isotopically pure diamond they first have to make them single-crystal, the grain boundaries are worse than isotopic impurities. [0] https://news.ycombinator.com/item?id=39742447 https://news.ycombinator.com/item?id=39742447