I have two.
This is where I started.
These tables have lots of layers on them. I started with a grey primer. Followed by a mix of gesso, and spackling paste (tutorial coming). This mix gave it a lot of texture. I then gave it a coat of a white gesso/paint mix, and finished with a wash of watered down soft grey.
The marble was cracked.
I used a high performance glue, which expands and creates a very tight bond.
I removed the excess, and sanded it smooth. I bonded the marble inside the openings as well.