Is there anything out there that looks like abalone pearl?
Not that I am aware of. I assume you are talking about grey with some green in areas. If so, there might be a way of simulating something somewhat similar.
There is a technique used by guitar makers where they spray a dark dye and then sand it off. In the grain areas where the wood is soft, the dye penetrates to a greater depth. So when they sand it off, they remove the dye from the grain areas with harder wood, but it remains in the areas with softer wood. They then dye with a second color over the entire surface.
Since the dyes are translucent, you see right through the top layer of dye to the original color (where it remains) as well as the underlying grain/figuring in the wood.
An example of this is spraying and sanding black followed by a second coat of blue. The result is a very rich, dark blue with blue highlights on a dark blue (black) field. Very nice looking.
By experimenting with a combination of green and grey, you may be able to roughly simulate abalone.
Just a thought...