[afafsd]

I doubt it. Look at pearls or diamonds.

The sort of people who will pay extra for brand new ivory aren't going to bought off with fake ivory.

[SamReidHughes]

Fake pearls are distinguishable, and I don't know much about the state of lab-grown diamonds.

[dllthomas]

Lab grown diamonds are superior.

From 11 years ago: http://archive.wired.com/wired/archive/11.09/diamond.html