They look like drops of color in the fabricating of the slab and IMO a redo since not fixable at all. Or get a discount and move on to more imporatnt things .

Thank you for your time, Patricia, I appreciate.

If you don't mind, can you explain what 'drops of color in the fabricating of the slab' means to a layman such as me in this instance. Do you mean the slab was defective or the fabrication was defective?

Quartz is man made so they do the veining sometimes really almost by hand sort of like if you dropped a drop of paint on a paper and then used a tool to create the veins to look like marble so if that drop was missed in the mix this is what it could look like .Kind of like this see how the big part of the black are blended .just like quartz fake veins

I wonder if that can be buffed out?

Thanks for taking time to respond, unfortunately, Patricia commented above that it's not fixable.

How thick are the slab? Looks like the edge was mitered?

Did mark the pieces they were working on with sharpie? In that location, I would be tempted to try a magic eraser on it. It will dull the factory finish, but shouldn't be noticeable in that spot.

Correct, they were mitered, thickness is 2 1/2” I actually mentioned what you said to one of the guys installing, he denied but we have since sent photos to owner of fabrication company to see what he says and we’ll go from there Thank you for taking time to give suggestion :)

Color pooling is normal and fully acceptable. Those are not surface created. They go throughout the slab. Your fabricator can drill them out and fill with a white epoxy, but it will look much worse, and wear badly in that location.

Thank you!

There are marks of similar widths on both corners. Looks like Sharpie to me. Have you tried applying some rubbing alcohol to see if the marks come off?

That was my exact my thought when I first saw, really looks like it in person even though the installer told me no, his answer was "it's just veining". I thought that was odd as there is no other veining that dark or that wide anywhere else throughout the house. Now that others have mentioned it could be color pooling I have reached out to the owner of the fabricating company and ask him to come by to take a look. Thank you kindly for taking a look and responding. :)

It’s marker. Zoom in on the photos. It’s exactly where the miters join- literally on the joint. There is no way for that to be resin pooling.

That was my reaction, Hallett. Looks just like a sharpie mark. Right on the mitre seam. Maybe they can get it out, but if not, and everything else is good, I'd let it go.

Thank you both very much for weighing in. I will post once owner shows up sometime this week.

The top isn't mitered at the sink cut out; you can see the lamination line. Notice how none of the gray/black veining passes the half way mark?

These appear to be divots filled after/during fabrication. Unfortunately, the color match isn't perfect. They can be drilled out and refilled to match more closely, but really, they are small and not at eye level.

No the color match is far from perfect--big blobs of black on white? Why would anyone do that? wouldn't you use white to fill the divots? I still think it's a sharpie/marker

IF it is Sharpie, it will come off with ordinary Formula 409

"How to remove sharpie from quartz?

I have had this happen a few times on my quartz. My counter top installers recommended Formula 409. It worked great. I just sprayed it on and let it set for a while and the Sharpie was gone.Jan 2, 2023"

( It's on a vertical surface. Saturate a rag, and duct tape it on ) Repeat......

Failing that?

Rubbing Alcohol on a Norwex microfiber has worked for me.

If it doesn't come off? It may not be Sharpie

It is inside a farm sink......at which point you move ON and enjoy the kitchen.

I have a white quartz kitchen counter top and the same for my bathrooms. This looks to be a stain made during the production process. If it does not come out or even lighten out with Soft Scrub used with a Scotch Bright sponge or Bar Keepers Friend it will not come out. Hairspray on a Sharpie stain should take out that kind of stain. You can call the manufacturer of the stone and get their opinion on how to get rid of it. Maybe a professional can dig out the stain and fill it with crushed counter stone and glue it in, then sanded then a white sealant is put on top if it bugs you that much. For now just paint it white with a white lacquer spray paint.

Thank you both. I appreciate all suggestions. There was never question not to be able to move on based on where marks are located, I simply posted here to get advice or thoughts from those with more expertise with quartz as to what it may be to make a better decision to revisit with fabricator before doing so.

It literally looks like lowercase letters- l and r- on the left and right sides of the sink... perhaps to aid in proper installation?

I am getting super invested in this - hope you circle back and let us know 😅

I am not a picky person but those marks would bug me, I’d want them removed or at least toned down if possible

I certainly will, I understand, lol...they bug us as well and that's why we came here to get a bit more informed to what others may thing they are and if there is a possibility to eliminate or at least lighten before we just move on as in person while standing at sink, they really stand out. I can't say when I will post as I don't have a date when the fabricator is coming back, but he assured the GC that he is so I will post after. :)

DLB:

I've actually had this callback in my sink replacement business. We bisected some sink clip slots and had to fill them. My employee didn't get a good enough color match to make the customer happy. We went back and the do-over was acceptable. It ain't all that.

Thank you so very much for sharing this info, it will be very nice to be able to resolve. Appreciate your time. :)

You don't have a store with ordinary 409? in the cleaning aisle or rubbing alcohol? Like......have you TRIED either?

What if it is all much ado about..nothing

Rubbing alcohol will work on marker

Thanks for advice, we have tried all topical solvents suggested with no luck so still waiting for fabricator to return :)

I hope they haven’t been paid in full.

Note how the top of each angled mark starts about 3/4" down and about 1/2" in. The chances of getting matching angled marks from a Sharpie are very low. This looks like someone was grinding a slot for a rod, realized the material was engineeres stone, stopped, and filled the slot with black instead of gray. This mark is not topical.

Thank you again Joseph, I appreciate you sharing what you believe why these marks are there. While they haven't come back yet, the GC just this morning told me the owner of the fabricating company saw the photos and said not to worry, he will be back to fix which, in my minds validates what you have been educating me on, something went wrong on their end. So again, thank you for sharing because it educated me enough to revisit with the GC and fabricator. And, Hallett & Co., no not paid in full yet, still waiting on one other area to install and I believe when they come back, the owner who did the templating but wasn't there for install will most likely come on this install to fix the sink area.