Okay, fern, I've held my peace up until now, figuring yours was just another approach. First, if you are going to be the self-appointed (and I will add sanctimonious with your last post..."some people are not willing to struggle": could your posts BE more condescending?) PC cop, at least be consistent: those who lived here first are most gently known as Native Americans, NOT American Indians. I'm not going to bother trying to explain why, but the "indian" thing is a relic. Second, "look up names in decorating books"?!? Do you really think "decorating books" are a primary source of unimpeachable knowledge? Especially of etymology? I'm absolutely gobsmacked that you think etymology should be decided by interior designers. Third, is it actually possible that you think anything written on the internet is necessarily factual? The enormity of mis-information in this medium canNOT be overstated. Your lack of intellectual rigorousness regarding primary versus secondary (et.al.) sources is matched only by the vigor by which you defend these dubious/unsubstantiated assertions. I gave you the benefit of the doubt upthread (hey, maybe you actually WERE an etymologist by trade...) with an inappropriately vehement thing against igloochic. Whatever. But your last post spilled the beans. Your diatribe is actually, stunningly, horrifyingly based on SOMETHING YOU READ ON THE INTERNET. (And one must love the alternative reference: decorating books. I have not the words.) Geez. Can you imagine what you'd do if your outrage was actually based on verifiable FACTS? (Yeah, I gotta figure out how to italicize on this forum. I know the caps sound like I'm strident, when I'm truly just going for emphasis.)

You could epoxy a piece of metal - 1/16" piece of steel or 1/8" piece of aluminum. Wide enough to bridge the crack by 3/4" or so, and 1" longer than the crack. I like JB Weld epoxy - you can buy it at the hardware store. Make sure the marble is clean and doesn't have any dust. Clean with isopropol, and make sure its dry. It's worth a try.

What people often do is to cut or have cut a rectangular piece, say 2" x 12", to attach to the bottom of the bullnose. So it becomes a rounded edge with an attached overhang. You don't even necessarily have to do that, if you are going for angles--you could just polish the outer edge of the countertop piece and attach the 2" overhang piece on that. It would be an angle, then, as opposed to a curve.

We have it as a subway tile on our backsplash. Ours is tumbled travertine. It seems hard enough to me. Both the travertine and marble are on the Arizona Tile website. Hope that helps.