Not P but DFW and cubic-zirconium

[Mike Jing]

The following excerpt is from David Foster Wallace's *Big Red Son*:

Alone and in a place of conspicuous honor on a wood-finish shelf above the
suite’s minibar is an actual AVN Awards statuette. The trophy resembles an
Oscar/Emmy/Clio except that the figurine’s arms are up and out (making it
also look a bit like Richard Nixon at the climax of the ’68 GOP
convention), and something slightly blurry about the casting gives it a
sort of cubic-zirconium aspect.

What exactly is this "cubic-zirconium aspect" about? Does cubic-zirconium
look blurry? Or does it mean it looks fake?