We purchased a polished slab of mother of pearl quartzite for our kitchen counter. Having read many online warnings about "counterfeit" quartzite, we had them cut a small piece from the corner and took it home to test. The top is shiny and finished and one side is newly cut and unfinished (picture shows the side view). The finished top, however, has spots that seem to have lost their shine. It looks like some kind of sealant or something was applied that perhaps was compromised by our tests. This doesn't seem right.
I'm confused because it seems to pass some tests but fail others. We put lemon, lime juice, red wine and red wine vinegar on top and there was no staining or etching. But some of the liquids rolled off onto the plate so the quartzite sat in it overnight, and the red color was definitely absorbed into the unfinished side. I took a nail and was able to scratch the top, but I couldn't make any scratches in the side. The last thing I did was to try to scratch a glass bottle with the edge of the quartzite, and it passed that test with ease.
I don't know whether to be concerned about the side absorbing the red color. I am definitely concerned about my ability to scratch the top. I want to talk with the fabricator, but at this point I'm not even sure what questions to ask. Or should I take my questions directly to the source of the stone? Any advice?