Is the crack the dark straight line about 1 1/2" in from the front edge? If so, that appears to be a classic reinforcement rod failure which is fabricator error. On smaller tops, the window to assess whetner or not a repair is cost effective becomes much smaller.

Where is the crack??

Hi Joeseph. Yes. it appeared after a contractor of my
Left some very heavy things on it for a few weeks. I’ve lived in my house for a long time, this too was not Newly done.

I don’t think it’s a fabrication erorr

Crack is about an inch from ledge is looks straight

It's fabrication error, not from heavy things being left on it.

Fabricators cut reinforcement rod slots too deeply, bed inappropriate rods like cheap cold steel with cheap polyester instead of more expensive exoxy. They clip instead of strapping sinks which cause leaks which penetrate through the polyester, rust the rod, the rod expands and splits the stone.

Gotta pull the rod for a permanent fix; may be cheaper to replace the top. Your edge will literally jump off the top.

Cheap Chinese rod failure in a hotel. The hotel management was even worse. They whined and cried about my charging them $400.00 for that repair and gave me a 1-star review. I'd never do it that inexpensively now. The room was unrentable. Two nights go to me and they're back in business. Idiots.