Yes, that was a joke.
A one carat diamond (cut correctly) is about 6.5mm. This is retail pricing for synthetics. A natural diamond that would be comparable would cost about $4700-5700, depending on quality. I'm accounting for the fact that synthetic diamonds would not fall into the colorless/near colorless range. So I'm talking about a J/K SI - ish stone for comparison purposes.
I said synthetics aren't cheap. They are significantly less expensive than naturals though.
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