Taking care of my new Granite - need advice
I looked at the photo, and that certainly does not look like granite. The word "granite" is misused all the time in the industry. Granite is a technical geological term that is usually defined like this:
"a very hard natural igneous rock formation of visibly crystalline texture formed essentially of quartz and orthoclase or microcline and used especially for building and for monuments"
from Miriam Webster.
The description on the web site for the material you purchased states:
"Deja Vu is a beige, brown, and grey stone made up of a rocky terrain."
I have no idea what a rocky terrain is supposed to mean, but the minerals in your rock do not appear to be quartz, feldspar and biotite, which are the normal minerals in granite. Not that your stone is inferior, it looks really good, the point is that true granite likely has very different properties than the stone you purchased. I have a "granite" countertop which is not granite either, and most of the "granite" countertops I have seen are anything from quartzite to schist, which are not granites. The reason companies call the stone "granite" is that nobody has every heard of quartzite, schist, gneiss or any of the other types of stone, so it would be hard to sell them to the public, so everyone asks for "granite" and as long as the company says its granite, no one is the wiser. Unless you happen to have geology training.
All that said, true granite is highly resistant to heat, alcohol, ammonia, mild acid, and staining. True granite does not need to be treated with toxic sealers, and in fact we did not treat our "granite" at all, we have had it for four years, no stains, no problems, and we clean it with Windex all the time. However, I don't think you have granite, so you may want to take the advice of the installer, who may know what type of stone it is, and also probably knows quite well how to clean it and manage it. If you plan to prepare food on it, as we do, you may want to discuss using a sealer, every sealer I have ever looked at contains highly toxic chemicals that I would not want on my food preparation surface.