Natural stones are no more difficult to care for than a fine wood, and as long as you have the proper cleaning products, they'll offer you no trouble at all. We regularly recommend and install natural stone showers, floors, and countertops in bathrooms, not only in customers homes but our own as well, and as you can see below, and the results are stunning!
Granite is also applicable to bathrooms but is most often used on countertops alone due to its slippery nature when wet. However, it is much more durable than your softer marbles, travertines, and limestones, as discussed above, and is not as difficult to care for...more on that in the next installment. :)