On Wed, 19 Nov 2008 15:41:32 -0500 in rec.crafts.metalworking, "Ed
Huntress" wrote,
"Larry Jaques" wrote in message
.. .
And Cubic Zirconia is the trade name of one manmade diamond.

Uh, not that I know of. It's the name of an *artificial* diamond. It isn't
diamond, manmade or otherwise. It isn't even carbon.

"Artificial" is pretty much just another word for "man-made".
I would call it imitation diamond or diamond substitute.