We recently had New Venetian Gold granite countertops installed in our bathroom. It feels very gritty.
I've cleaned it with SCI countertop spray cleaner and sealed it with SCI granite sealer.
It still feels gritty! Why and what can I do to get rid of it?
Unfortunately, you most likely have a low-grade granite slab and there's nothing you can do to stop the grittiness.
The gold-toned granites tend to have a greater occurrence of grittiness. Giallo Veneziano, Santa Cecilia, and similar granite colors more commonly have this grit issue.
That is not to say these colors should be avoided. Santa Cecilia is extremely popular and most slabs are perfectly fine.
What this does mean is that all stone buyers should pick out the specific slab they intend to purchase and not let a designer, stone salesman, or fabricator choose.
I wish I could tell you exactly why this happens, but I'm not a geologist. Essentially the slab is slowly decomposing simply because the integrity of the slab, the binding of minerals (which happened in the earth a gazillion years ago) is poor.
This slab was run through a giant granite polishing machine, but such slabs cannot be polished well. The surface just won't hold up to achieve that ultra smooth glossy finish.
Granite slabs are graded (and priced) based on such qualities and some shady dealers will buy this type of slab to increase profit margin.
If a fabricator picked out the slab for you, then you may have some recourse for replacement. Otherwise, not much you can do unless you want to apply some type of permanent topical coating like from Aldon, Kinloch, Clearstone or others.
Permanent topical coatings typically are not recommended for stone (doesn't let stone breath properly and can create additional maintenance and repair issues).
The manufacturers make it sound great... like they are a revolutionary improvement, etc.... but when all is considered it's better to leave stone alone as much as possible. However, coatings are making vast improvements in performance.
Coating maintenance is an important consideration. Once you apply a permanent coating you now have an acrylic or epoxy surface to maintain instead of a granite countertop.
However, in your case, it may be the best option.
Sealing won't affect this at all.... completely unrelated issue. Impregnating sealers like the one you applied work below the surface. They don't form an impenetrable shell or encapsulate the granite because again, that's not good for the stone.
A topical coating or resin, on the other hand, will form a film adhering to the surface and creating a physical barrier.