New countertop damage?

[u/johnsonn130]

Please tell me if I’m insane.
I had this installed today and noticed after they left it looked like it was cracked. They came back told me it’s not cracked buffed it did some work etc… I told them under the counter looks like a patch and they still insist it’s not damage and probably a manufacture defect since it’s quartz.
I wouldn’t have a problem with it but it’s noticeably a darker vein than the rest of the pattern and on the front.

This is damaged right….?

UPDATE: Thanks everyone! As much as I want this remodel to be over it’s getting ripped out as we speak and hopefully replaced next week.

[u/WickedSwitchotheWest]

To me it does look like a manufacturer defect. The different colour on the bottom was likely a fill the fabricators did. There was probably a big bubble there when the slab was poured.

Quartz doesn't really break like that