Glass Plus says it's safe for granite right on the bottle. I'm not sure if it's a sanitizer though. I like the alcohol water solution though because it's works the best of anything else I've tried and it's the most cost effective too (an added plus).

I would think most granites would be quite durable. We used a remnant granite in our guest bath and this is the bath that I dye my hair in so I don't have to worry about stains. We used marble, I know, it stains, but it was sooo much cheaper than anything else (corian, granite, cambria) and I liked the look so much better, I decided if I need to replace it in 10 years then so be it. The marble in our bathroom has held up wonderfully, the marble in my son's bathroom-well I will be honest there is a stain caused by hand soap, but it has faded over time. I don't think anyone would notice unless they were looking for it. We've been in the home for 2 years and so far no regrets with the marble. Silestone is of course very pretty and durable but the most expensive. Cultured marble scratches and stains.

I adore travertine. I have it (tumbled) on my kitchen backsplash and (honed) in a seldom used front entry. As much as I love it, I chose to do a travertine look porcelain tile for my bathroom floor and am using the real thing on the walls. I personally would be very nervous about using it on the bathroom (and kitchen) counter. I sealed the heck out of the kitchen backsplash and nothing that has splattered there has stained. But with all that a bathroom counter endures...I don't know. I'm afraid I'd just be too worried to enjoy it. I have some sort of stain on my honed entry floor. It got there when workers were in and out during remodel. Someone kicked up the brown paper that was protecting it :( I haven't tried a poltice yet but a natural stone cleaner hasn't removed it. The floor was sealed with a water based natural stone sealer. Monica

We have (not white and gray) marble or maybe limestone in our master bath. after almost a year and a half, it does have some etching. no photos-you won't see it on photos. I see it because I look for it lol. You need to see how the light hits the surface in order to see the etching. Then I'm pretty protective over it, and watch my DH who destroys surfaces with the easiness that I'd find amazing, if I chose to be amazed. In kids' bathroom..I'd say would depend on a)kids' ages b) kids' personalities etc say my son is a very tidy boy. Naturally tidy. my daughter, on the other hand, would ruin marble anything in a day. On the other hand I had limestone countertops for years and years(other country; most people have limestone/marble) and one really gets used to patina and possible etching etc. Obviously my kids used them too. So depends also on how set you are on having something flawless as possible. BTW I agree with Joseph about Corian, we had in our previous kids bath(solid white, not marble look) and it looked very nice while being really easy to clean. And my DD had so much stuff on these countertops I didn't have in my entire life. (she grew out of it but age 14-16..gosh)