They are fine, make sure they don't have any grease or anythign on them. You don't want to leave them in the tank. Don't forget what granular ferrous oxide is made of...RUST!
+1 RyanG. and be careful if you're purchasing new ones. Some cutters come with an "oil" type coating to keep them moving freely...It wipes off pretty easy, so I'm sure it could release into your water.
Doesn't your LFS sell coral snippers? They cost about the same as a good pair of dikes.