What can you not take from Hawaii?
Fruits and other plants can't be taken from Hawaii, particularly because there are certain fruit flies and other insects that are present only in Hawaii. You also can't taken any lava rock, coral etc. from Hawaii because it is extremely bad luck to do so. You can take shells though, and if you go to Dole cannery, they can inspect and package the pineapples so customs will allow to to take it on the airplane leaving Hawaii.