On 2 Dec 2005 13:26:29 -0800, "Eusebius"
wrote:

I'm after some nice looking marble effect material for the side pieces
of an amplifier.

Real marble (or one of any number of stones). It's cheap in small
pieces, so long as you're nearby to a stonemason. Even sawing and edge
polishing is pretty cheap, if it's only small pieces.