I really hate to break it to you, but you etched it. Vinegar and marble don't mix at all!

There are companies that can repair it for you, though. Be prepared to spend a few hundred.

I was under the impression that all of the stone throughout the house was quartz (OP Title contained Quartz not the manufacturer name), come to find out this was not the case...

Have no idea what "Widenbaker Engineered Marble" is..where did you purchase it from and what is the common name? Hard to say without knowing what the material actually is.

Thank you @Dragonfly Tile & Stone Works, Inc. for your response, Wisenbaker is a professional builder supply company (https://www.wbs.com/product-offerings/) and the stone is their "Marlana" Engineered Marble (https://www.wbs.com/wp-content/uploads/2020/12/Product-Care-and-Maintenance-Manual_REDUCED_R2020_12-11.pdf).

I would really appreciate your input on how to go about removing or resolving this. As mentioned in above post, I was under the impression the entire house had quartz installed however after further review of homebuilder's materials list I found this was not the case. Not too sure where or how to proceed from here.

Thanks again,

I had the same thing happen to our countertops, same company. Did you figure out how to fix it?