It must be my claim which is wrong. I was recounting what a sales person told me. It might instead be that they don't supply them, or might just have been an ou

It must be my claim which is wrong. I was recounting what a sales person told me. It might instead be that they don't supply them, or might just have been an outright lie. That said, a one karat stone is no good as a solitaire (the book from the article above talks about this: one karat stones all go into eternity rings, which were invented by debeers due to a massive oversupply of Russian one karat stones. Actually, the book implies that these stones may have been lab stones, as no-one knew where the Russians got so many one karat stones from.)