When you run your hand over it, does it feel different? Is it rough in those dull spots? Am I correct that you are saying that some areas are shiny and some are dull?
Don't be afraid to call your granite guy. Maybe he can come back out and give it a good buffing.
I'm not familiar with your granite so I don't know if what you're saying is typical of that type.
I'm sure someone will come along and give you some good advice. Hang in there!

it has a lot going on in it - right?
i agree on running your hand over it and checking for bumps or rough spots. it should be all smooth and shiny. unless you got it honed or something.

then check with the granite people.

I was actually looking at Mascarello when I went back work part-time and found that the office conference table is one huge piece of it. Apparently the office building used to be home to a kitchen and bath design store. It has a lot of variation but nothing at all like what you are talking about. I would definitely talk to the granite folks. It is a really beautiful stone.

I am not familiar with that granite, but it's probably perfectly normal. The busier granites have a lot of different kind of stones right at the surface. Mine has feldspar, mica and quartz, among others. Each of those different stone surfaces polishes differently, so each will reflect light differently. Plus you probably also have resin at the surface which also reflects differently. Call your granite guy just to be sure though.

Unfortunately Mascarello is one of those materials that would not be on the market without all the resin that holds it together.

What you are seeing is the resin spots that do not hold the polish and possibly the natural black carbon spots as well.

This is the true nature of this material.

Wow! You all are great! Thanks for the responses!! Yes, my granite does have mesh on the underside of it. Thanks for explaining the reason why. When I run my hand along it, it does feel pretty smooth, but there are variations depending on which stone is on the surface. I'd try to post a pic but I don't think it will pick up what I'm describing.I'll attach a pic here. Also, if you can notice, the edges don't look as polished or shiny as the surface. Is that a defect in the fabricator??
Thanks again!

Here is a link that might be useful:

mjlevpt, I'm wondering if you ever got any resolution on the issue with your Mascarello granite. I'm in the process of picking granite for my new kitchen right now. I see by your picture that you also have white cabinets (as will I). I keep coming back to the Mascarello granite, but have wondered how it would look in a white kitchen. We have warm-toned walls and floors. Do you have any other pictures? Are you happy with your granite choice? What did you do for a backsplash (next big decision!)
TIA for any feedback you can give me!

I would love to see some photos of the final product installation; I'm choosing between Mascarello and Sierra Bordeaux, but want to see some other Mascarellos out there that folks have had installed. The Sierra Bordeaux costs 10K for 124 square feet of counter space and the Mascarello costs 15K so would love to hear how this problem was solved before dropping an extra 5K for a problematic granite, especially with the added resin and mesh.

Any suggestions on a backsplash? Thank you

I just installed mascarello granite with off white traditional cabinets and love it - about to pick the backsplash. Looking at travertine with a slight gold tinge (fossil ridge). Did you select a backsplash? Interested to hear your choice.

Mascarello has a lot of colors. A granite when it is made over time, those different colors next to each other make some bump out. As much as they try to smooth it out, they might damage it more and would have to fill it back up with resin if the granite chips off. Remember, those colors are what gives it its character. The mesh behind it is the glue that holds it together. You have a gorgeous piece. Be happy. And no it is not dirty. Those are the colors. Just remember to clean it with just regular mild liquid detergent and water and remove with water. Wipe dry. Anything else, you will hurt the sealer they installed. By the way, on the edges, each stone, when you have this many colors, there are some does and don't. You chose the don't. That's why it is not smooth. Rock face, strain down, bull nose. Those would work. Anything more elaborate would be rough due to how many stones are mixed in that area. Keep in mind, more color variations, don't go elaborate on edging. Ask questions! Good luck!