Diorama is the fourth studio album by Australian alternative rock band Silverchair. Released on 31 March 2002 by Atlantic/. It won the 2002 ARIA Music Award for Best Group and Best Rock Album. The album was co-produced by Daniel Johns and David Bottrill. While Bottrill had worked on albums for a variety of other bands, "Diorama" marked the first production credit for lead singer Johns.

Can we draw the following conclusion?
"Diorama" did not sell a single copy
No