> *There is an infinite supply of lab-made-diamonds, however they are not fungib...

> There is an infinite supply of lab-made-diamonds, however they are not fungible with real diamonds.

Ada Diamonds sells lab-grown diamonds and jewelers can't tell https://news.ycombinator.com/item?id=17228369

De Beers admits defeat over man-made diamonds https://news.ycombinator.com/item?id=17183603