Tips Engraved Set

My now fiance just proposed with this beautiful emerald engagement ring

http://zales.imageg.net/graphics/product_images/pZALE1-2217597t240.jpg

It has hearts in the setting on both sides below the emeralds and 2 surrounding diamonds, and the words Past Present Future are engraved on the inside with little diamonds set inbetween them. the ring is absolutely gorgeous, emeralds are my favorite stone and I am very sentimental so this was the perfect ring for me. I just have no clue how to take care of it. I heard that emeralds can chip, so how can I prevent this? Can I expect it to last a lifetime if I care for it properly? Any help on care and tips (professional or everyday use) would be greatly appreciated, I don't have much jewelry because of a nickel allergy and I want to make this last.