[elli1]

But, I wonder how much the processing itself costs.

''CVD diamonds cost well over one hundred dollars a carat to produce,'' according to info in this link: Link

[fso301]

''CVD diamonds cost well over one hundred dollars a carat to produce,'' according to info in this link:

So this 10 carat baby cost over $1 billion. I think your source is using out of date information or, it was a typo.