Thanks Joseph, what do you mean by “squish some contrasting "veining" in and drag over it once (and only once) to blend.” ?

Better pictures

Epoxy is acceptable. That epoxy is not.

Sophie what should it look like?

That’s a nasty miter joint in the 3rd picture. Should be done over.

Joseph, what part of it is bad? How would it be done over?

That is a horrible miter. It should be a lot tighter than that, IMO. I have a waterfall and it’s extremely difficult to detect the seam.

Yikes that looks much better than mine, how would they go about redoing this?

A little further away

They would take it apart and redo the epoxy.

Do they do that with a heat gun? They did that in another seam because the installed correctly and now the seam is discolored because the epoxy seeped into the marble

Unfortunately, I'm not sure how they would fix it. I would consult another independent fabricator for advice.

It looks like they not only chipped the marble, but it looks like they broke the mitered end off, chipped the marble, and glued it back together. It's not horrible, but it's not good work.

Redoing the miter has its own risks. No way I'd let the homeowner watch.

Joe, would this also be considered poor work or is just the end where the end was broken off?

This is certainly a poor repair, but it shouldn't take to much effort to redo.

Problems like this reinforce my growing conviction that stone is a faddish, lousy choice for people who actually use their kitchens to prepare and cook food.

It's not the best mitering, for sure.

Should I be accepting the fact that they broke off the end of the mitre or should allow them to try and repair it again? Thank you all for the advice.

They deserve a chance to make you satisfied.

So they came back and redid the seam color and repair of the mitre, the color is better but the repair is still very noticeable.

It looks exactly the same...

Being told that they can make it better when they do the “resin”

They lost the chip and have made a piece with material that doesn't color match. That explains why the piece fits so poorly too.

I am a fabricator. Unfortunately, when working with a natural product sometimes it doesn't cooperate. Repairs are common and a good fabricator will do it such that the end user will never recognize it as a repaired area. In this instance I think a really good fabricator could make a repair that would be acceptable assuming some of the original material is still available. The fab shop dug a hole for themselves by letting a poor repair out the door. Properly done, it would've been repaired in the fab shop (where it's much easier to do) and the homeowner would have no complaint.

Unfortunately I don’t think that this is one of those, the fabricator is now suggesting that they can fix several issues, epoxy bleed through, rust spot, and this repair by polishing the countertop in my home and in order to get it back to original shine apply a clear resin. I’m kind of at a loss as to what to do, I went to speak with the owner and he assured me his fabricator is the best and he will be able to fix it with this method.

What are the other ways of properly repairing this? When I asked it seemed like filling the cracks and voids with colored epoxy was the only option. Could be that the fabricator didn’t want to take the time I guess.

Looking at the sloppy underside of the mitre for the waterfall the stone is not even touching

This is also one of there seems, looks terrible imo

This is my biggest concern in hiring almost anyone. As the homeowner, expectations are high, and many fabs don't take enough pride in their work and rush, rush, rush...

I am a fabricator. Yes, the seam could be a lot better. Regarding the gap on the underside of the miter; a small gap is not unusual. When cutting the miter angles the mitered edge is usually undercut by a small amount so the "pointed ends" of the two mitered pieces can be mated without a gap. If the angles are off just a little the wrong way it's impossible to make the pointed ends of the miter cuts mate perfectly. The slight undercut results in a small gap on the backside of the miter but since it's underneath and filled with color match epoxy it's not a problem.

@Granite City Services Thanks for the really helpful comments above in the thread above. I would love to get your thoughts on this countertop, installed in a new development. What you do you think about the quality of this seam? Is there anything that can be done to address this?

Tough to tell what I'm looking at from the pics. An image with the seam running vertically and no shading or colorizing would be very helpful.