Why reinvent the wheel?  There are tons of free materials all over for poser.

RDNA has many free packages in their free area. Just search for material and  textures

Mapps also has several free materials, including some gem ones

http://www.freewebs.com/mapps/

And a search for materials here yields a number of pages.

Renderosity free stuff search

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi