These Marble Slab pictures will show you some examples and give you a good idea of what marble can look like.
Here's an Alba Chiara marble slab.
These are Calcatta Gold marble slabs at a wholesale outlet.
These are Bidasar marble slabs.
Here's a variety of different types of marble slabs at a marble dealer's warehouse.
Here's a Green Onyx marble lab in a custom shape.
Here are some beautiful Paonnazzo marble slabs.