Those appear to be natural occuring fissures and not cracks. Are they open, can you catch a fingernail dragging it across them? That also appears to me to quite possibly be marble. Do you know what it is? Have you tested it for etching and staining? Has it been sealed?

@millworkman The one near the faucet (third photo) that looks thicker yes your fingernail can catch but some of it is smooth. The smaller vertical one in front of the sink (first photo) will also catch my finger. The one that runs along the front of the sink does not catch my fingernail.

And yes its marble - my paperwork had the name as "white crystal".

They also seem to have more of a yellow tint around these areas.

It was just installed yesterday and was sealed. They said not to mess with it for 24 hours.

Cracking is completely normal with natural stone. My granite snapped in half as they were loading it- now that it is repaired you can't see it.

Hopefully Joe will chime in but that yellow looks like a failed attempt at repair- badly set CA glue?

@HALLETT & Co.Thanks for the information. So these should be able to be fixed no problem? Or due to the bad repair job are we already passed that point? My fiance didn't notice it at the time of the install and she called 20 minutes after they left. I am guessing they cracked it, and tried to quickly fix it and hoped she wouldn't notice? Just trying to find the best course of action

Showed this to my DH who is a professor of Geology. He wants to know what the rock actually is. White crystal is a "trade name" not a rock/stone name. At the least, can they give you the country of origin? This info will help determine if it's a stress crack from drilling or something naturally occurring. Also, knowing this will enable advising on future care.

@tozmo1 it is marble. I am not sure on the country of origin I would need to figure that out.

I am a bit outside my depth. If the seam gets contaminated it’s hard to get it looking good. Hopefully they will have answers. When my stone cracked they called me immediately and said it would be perfect or they would buy me a new slab. The repair was done on my front lawn with the slabs on sawhorses. It’s not rocket science, it just takes a skilled person.

Per the geologist, calcium carbonate (marble) is a very soft rock that does not often have fractures in it naturally. He feels the placement of the cracks indicate fractures from the stress of the drilling. He explained, "you take a thin slab, already stressed (not a scientific term, just indicating that by cutting a chunk of marble into a thin slab, it's lost a lot of structure that gives it rigidity), and then cut holes in it, further stressing it, you might get cracks like that. But without seeing it in person and under a microprobe, he won't put his absolute authority behind that explanation. :-)

Once it's repaired stay away from anything acidic such as vinegar or orange juice. That will eat it away.

"The one that runs along the front of the sink does not catch my fingernail."

I just reread that and saw the picture. Those are blown rods front and rear. Repairable on old tops; unforgivable on new. I'll bet they cut the rod slots too deep. It also means your thread title is incorrect. The rods were blown at the shop, not at install, because they were repaired because you can't feel the one in the front. They know exactly what they're going to find when they come back out, because they're familiar with it.

New top or new sink. Insist.

No rods next time. Sink Hole Savers front and rear at install and a strapped, not clipped, sink.

@Joseph Corlett, LLC Thank you for the information. Is the discoloration (yellow in color) around these cracks from them trying to repair the blown rods at the shop as well?

Show him this thread. He knows I busted him fair and square. He's trying to pass his mistake of too-deep rods onto you. Don't let him get away with it please. How much hassle in getting him to make it right is in direct inverse proportion to how much money you owe him.

The Sink Hole Savers will prevent the stone from breaking on the way from the shop to your cabinets. The strapped sink will turn the sink into the structural support the missing rods would have provided. Clipped sinks cannot provide structural support. This is the reason why you insist it's done this way.

If he has more material, it's probably going to be less expensive for him to replace the top. If there is no more matching material available, a sink replacement may be less expensive than replacing all the tops.

" Is the discoloration (yellow in color) around these cracks from them trying to repair the blown rods at the shop as well?"

Yes.

Yellow adhesive is typical of polyester, the cheap stuff they set rods with instead of the more water-resistant and more expensive clear epoxy and/or methacrylate. If you accept a repair short of pulling the rods and removing the polyester, the topical poly will fail, the penetrating water will rust the rod, the rod will oxidize, and literally blow up the stone. I've seen it and fixed it 50 times.

I'll give him a free phone call or two if he needs any help. 248-842-5693.

@Joseph Corlett, LLC update: fabricator came out to inspect. He said this type of stone cracks more than others and that they filled the cracks with epoxy. They said that was adequate fix due to epoxy being stronger than the stone.

We did confirm the sink was glued in and clips were not used.

we insisted that was not okay after consulting with others, and requested a replacement slab or for him to look into the “farmhouse” style sink that would eliminate that stone. He seemed to laugh at that as it was not an option. he said he would be calling us tomorrow to let us know if he found a replacement slab.

Sounded he knows they made a mistake and were trying to take the easy way out first.

Chad:

Open your dishwasher door please. Look up under your countertop. You'll probably see a yellow/orange line about 1/4" wide. Measure the distance from the center of that line to the edge of the countertop. Measure the distance of the crack to the edge of the countertop. They are the same, I promise.

What specific type of adhesive was used to "glue" the sink in place please?

I can't believe someone would blow up a top and have the nerve to tell a customer that a repaired crack is acceptable.

"...or for him to look into the “farmhouse” style sink that would eliminate that stone. He seemed to laugh at that as it was not an option."

The apron front sink I pictured is my design; I doubt it's available anywhere else with the exception of a shallow ADA-compliant Elkay which you don't want. I'll build him one of those 14 gauge beauties when he sends the dimensions and payment in full in advance. No refunds.

See how hard he laughs when you sit on his balance.

Gotta say that Joseph Corlett knows what he’s talking about and gives lots of excellent advice....for free!
Love it!

@Joseph Corlett, LLC is this the line your talking about? I found this line near the back of the dishwasher

@Joseph Corlett, LLC

Yes. That proves they made the crack trying to reinforce the stone or when they drilled for the taps. Regardless it’s not a natural issue with the stone, it was an issue created by the counter company

Slam dunk.

I don't know what that crap is that they filled the rod slot with, but I'll bet it expands when it catalyses. It looks like wood dough.

Chad:

You got lucky in your rod placement. I'd saw it out at about the 2" mark. That will leave you plenty of room for faucet clearance and backsplash thickness when they install the custom sink with the faucet deck.

Were it closer to the wall, you may have to fill the rod slot which doesn't always look that great, or replace the rear rail which means more or recycled material.

following

following.

Update:

Fabricator will be giving us a new slab for that piece of the countertop. We went to the shop to make sure the piece matched which it did. They are installing on Friday so we will see how It turns out this time 😂

appreciate all the help thus far

Good news, but no repeat of the same please. No rods.

Hooray!