Hard composite wood like machining - benolix?

Hey Guys... this is what I'm looking for but not exactly sure of the
spelling but I believe it sounds like "benolix" (tried Google but
wasn't correct spelling).

What it is - a dark brown / near black material - (composite plastic?)
that is very hard and machines very nice?? It can and is commonly used
for dies where something is pressed around it / inside of it? It can
be machined to a very nice finish but is easier than metal more like
very consistent hardwood - plastic wood composition???

Thanks for any help or a substitute material for same. I have some
aluminum (.035" - .050")I'd like to machine inside / outside dies for
some parts I have coming up and do not know where to purchase or
accurate name for same.

Any help appreciated!
Darren Lucke