Platforms: granite, marble, maple or other?

I have 2 granite blocks under speakers, with Audio Resolution platforms between the speaker and stand. LOVE the combo.

I have another granite slab (about 24" x 15" x 2" high) for under my amp, have good and bad results. Some loss of "life" to the music, though the bass tightens and it seems overall a little quieter in the background.

I haven't tried maple under the amp, but I think that granite under speakers and maple under amp might be extremely good.

Post if you try different combo's out.

PS: Marble would be big bucks. I got granite "extras" at a stone yard for cheap. 2 12" x 12" x 16" granite blocks, ~300lbs each (!) for $100; and 2 granite shelves, one is 1" and the other the 2" thick mentioned above, both for $25 !

Thanks for the tip on the John Boos items at Home Depot. Just picked up one, put it under my integrated amp (Pathos Twin Towers); I think I'm going to like this a little better than the granite stand I had.

More listening to do, but it looks liek a winner at cheap cost. Now I just wonder if maple boards made of less pieces (and less glue) would sound even BETTER ! Not worth it perhaps, but we'll see.