I believe Abalone has a toxic property.I recall from my stone cutting days there were regular notes in cutting books on Abalone.Minor exposure causes headaches and weakness,more severe exposure causes vomiting,fainting and convulsions.BTW Malachite is toxic,too.Most shell,and ivories create splinter dust ,which gets in your skin and lungs like asbestos or fiberglass.Shell is cut by the cutting industry under a water spray.
I just did a search,and yes,the dry dust of abalone is quite toxic!!!!!