I am sorry, I do not know. But I think you have marble there, not quartzite. There have been a number of threads on this forum cautioning people who are looking to put in quartzite counters that many slabs sold as quartzite are really marble, and will etch and stain like marble. Real quartzite doesn't do that.

That ain't quartzite. Those are etches. Put your restoration professional on speed dial please; you're going to be calling often.

Create more patina, and accept that patina, is the best long term solution. You’ll make yourself nuts if you try to “fix” every little etch on marble.