mtv: I am not sure--perhaps the sealant? I will call my fabricator and ask them what brand they used. I have never had any problems with etching. Have left lemons, vinegar, red wine and various other acidic things on my counter and I have no etching, and no staining for that matter.

My fabricator did a huge amount of stuff for our remodel, so he should be willing to share and respond to my questions--will ask on Monday!

Firsthouse-THANKS SO MUCH!! My fabricator used DRY TREAT STAIN PROOF ORIGINAL and I have a leathered finish. Vinegar was my culprit. Left a vinegar jug overnight but you say you left vinegar too. Did you leave it overnight? Also I recall you have a honed finish? Did that lighten your stone considerably? My stone was much lighter before they applied this sealer and I was dissappointed. Fabricator said it would darken very little but it darkened a lot! I suppose you have sealer too and was wondering if that darkened your stone too? I really appreciate you taking your time to ask your fabricator!!!!

FIRSTHOUSE+Sorry to bother you again! Was wondering if you asked your fabricator? THANKS!!!!!

We have what I think is White Princess but it's polished. Our fabricator used Miracle 511 Porous Plus and I've tested with all of the culprits (including vinegar) and it's been fine, but I don't think the sealer has much to do with etching.

If it etches I wonder if it's really Quartzite - Quartzite shouldn't etch at all because of the properties of the stone.

MOMQS_Was wondering, did you leave vinegar overnight? Also I get conflicting information about quartzite. Some say it etches and some say it does not. How can I get the right info?

Yes - balsamic vinegar over night - 24 hours actually - it ruined the marble I tested within a few mins - it didn't do anything to the quartzite.

Perhaps you can post a photo of your slab and stone experts can comment on whether or not it's quartzite? A close up might help so that they can see the crystals. My stone is obviously very different from granite and marble.