Onyx counter tops [View all]

I plan on using onyx for a counter top. The area I plan on using it at is not for food prep. It will be 16 feet by 18 inches. Used for a counter top with cabinets(the first 6 feet or so) then breakfast bar ( about 5 feet)then a coffee bar(the last 5 feet). We will have under lighting so it will kinda glow. My question is has anyone on here used onyx before and how delicate is it? I have read everything on the internet about it. I have a friend who is a kitchen designer, and she says it's perfectly fine to use. I just don't want to make such an expensive investment and then for it to look like crap in a few years.