Gus

What you may have is a maple laminated bench top with a black resin
coating. Any screw holes you can find? Take a chisel - preferably
a beater - and see if you can get through to what's under the surface.
With luck you'll find wood.

I picked up a similar "lab bench" for $50 and it made a great
woodworking bench top. The ones I scored were 1 3/4" thick,
3' deep and 6' long. With some judiciou planning got a 20 1/2"
top layer and two 6 1/2" pieces for the outside underside
(you don't normally pound and hack and hew in the center of
the bench top)

http://web.hypersurf.com/~charlie2/D...CBbench22.html

On the other hand - you might have a slab of granite - but
I doubt you could lift it if you did. If it is granite - and the
surface is FLAT - it'd make one hell of a nice assembly
bench.