I don't think it is a good idea to cut the meteorite. Even cutting a small section from the meteorite will probably reduce its' value by a fair amount.
Large meteorites are scarce.
Cutting something off of it will place it in a smaller size catigory with many more meteorites than as of now. Cutting iron meteorite with diamond blade message. If you haven't read the Rock Net FAQ and User Tips yet, now would be a good time to do so.