@tracsurf What I've heard just from my own general research is that you need a lot of water for cutting these delicate stones. I've been told that "everyone" will be using water with a saw to cut natural stone, but you need someone who uses a lot of water. I've seen one fabrication shop that even had drain valleys cut all throughout the floor of the shop to manage the water overflow. If you can find anyone who successfully fabricates and installs Neolith or porcelain slabs without cracks on a regular basis, they'll be equipped with better supplies and processes to also fabricate quartzite without cracks., though some quartzite is definitely more problematic than others. You can ask around at all the slab yards near you if any fabricator is known for being well-equipped for quartzite fabrication and experienced. I found two in my area this way, Escobar Marble and Active Granite, both in Dallas, Texas. If they aren't in your area, you might give Active Granite (the larger shop) a call and quiz them on what types of equipment they have to get leads for someone similar in your area. Both these places came highly recommended to me as shops that had the proper equipment to fabricate, transport and install delicate materials in comparison with other shops that simply didn't have the right equipment and tools for preventing cracking.

Taj Mahal and any quartite for that matter is so dense that it is particularly prone to cracking without experienced fabrication and installation. Some cracks can be repaired satisfactorily, but not usually inconspicuously, and if the surface wasn't properly installed, you could be seeing more cracking in the future. You should reach out to your contractor immediately for warranty service. If the contractor prefers to replace rather than repair, you might consider a different surface to avoid the same problem given that the installer obviously did such a poor job and left it with no comment. At the very least, you should not use the same installer for any replacement if at all possible.

The cause of our structional damage was due to the contractor bringing in fill dirt and not compressing it. He smoothed out the dirt and built the house. Within a few years the dirt settled and half the house went with it. The piers (for support) he installed under the concrete slab did not go to solid ground. They fell out like toothpicks when the plumber dug through the side of the house. When we were sodding the backyard the guy said we had a leak coming from bottom of house. We tore off wallpaper near sink in master bath and there was no leak but pipes were starting to pull apart. I had an engineer (not structional) from work come out to get his advice. He said worse case scenario....every pipe under your bathroom floor is broken. Sadly he was right. It cost about 40,000 to get all the issues fixed. Nobody took responsibility. The had to pour grout underneath the house to fill the void and all pipes had to be repaired. Look OP, your situation could be entirely different than ours. You obviously are having settling but in order to see if it's minor or not get a structional engineer to assess your house.

@joseph_corlett I have no intention to pick up a fight with you online. It appears that you're a GC, not a structural engineer, so I guess I will place more trust in the words of a licensed structural engineer and do what s/he suggests. Obviously, you have the freedom to leave whatever comments you like here. But, if I were you, I will probably refrain from doing that. What you said previously gave me the impression that you may not know what you are doing as a GC. If I am a customer in FL, you are probably the first GC to skip on my list after seeing this post.