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Not sure what could have caused this. The granite is called "Blue Pearl" and it's polished.

This happened on an area around the sink in the bathroom, multiple spots. It's like certain components of the rock were dissolved by something.

Can it be blamed on a poor quality stone that was filled with something that washed away in time? Update: pic of the sample mentioned in the comments

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    Usually granite is thick enough to grind down smooth, no need for fillers. Think real granite would need to hit with something hard(hammer) to cause dents, but certain cleaners/chemicals(usually not household use) might eat away at it. Is it real granite or a covering called granite(formical/laminate)?
    – crip659
    Commented Aug 30, 2022 at 11:49
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    I've have that sort of damage in a soapstone bathroom countertop. The damage is in places where the water has been allowed to sit. Like OP said, it's like the soapstone has been dissolved or otherwise attacked by the water, which in our case is slightly hard. But I wouldn't think granite would be susceptible to that. Our granite kitchen counters, on the same water, show no such damage.
    – SteveSh
    Commented Aug 30, 2022 at 12:08
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    This doesn't look like granite.
    – isherwood
    Commented Aug 30, 2022 at 12:47
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    It looks like flakes of quartz in whatever substrate for the majority of the counter surface and that some of the flakes have come out. Are you the one who originally had these counters installed? If so, give your stone people a call. Also, it appears that you have several pics on your phone there, if you would upload another pic or two, it may help people ID what's going on. ProTip™: You can simply upload the pic and don't have to upload a screen shot of the picture...
    – FreeMan
    Commented Aug 30, 2022 at 12:50
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    @crip659 - Yes, you're right. It was one of those things where we were in the stone store, saw the counter with sink laying against the wall, found out it was the right size for the new bathroom vanity that was going in, went with the color scheme, and so bought it on the spot. Would not do it again (soapstone counter top).
    – SteveSh
    Commented Aug 30, 2022 at 12:51

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