We sell fantasy Brown as a marble. It's actually a dolomite so much harder than Carrara but as far as etching and staining it's a marble. The other I have never heard of but if the place you're looking at has fantasy Brown labeled as a quartzite I would proceed with caution. Request a sample of anything you select and see if you can test it yourself.

They have fantasy brown listed as a granite (the second image). So it’s actually a marble? Does the first one look like a marble as well?

My rule of thumb is if it looks like a marble, treat it like a marble. Fantasy Brown is absolutely not a granite. It's somewhere between a marble and quartzite.

Both are marble.

Both look to be marble. Please discuss this with the people you are purchasing the slabs from. It's risky to ask strangers here for advice no matter how good people's intentions are. Good luck to you with your project, I hope it turns out great!

What is the name of that beautiful Quartzite and where did you find it?

we got Super White and had it leathered to help avoid etching. it looks great and no issues yet. You could consider the same with either of those slabs

Drag a beer bottle down the edge of that slab and get back to us, please.

In other words scratch it with glass. If you see a scratch it isn't quartite.

Karin_MT's great countertop geology series should be required reading :-)

[https://www.houzz.com/discussions/countertop-geology-part-six-lets-talk-about-rocks-some-more-dsvw-vd~2692150[(https://www.houzz.com/discussions/countertop-geology-part-six-lets-talk-about-rocks-some-more-dsvw-vd~2692150)

Thanks everyone! I will proceed with caution with both counters now. My cooking often involves lots of spices and acids, thus while I love the look of marble the most, I want to stay away from all the etching and stains