Anvil Item Crushing

I am attempting to add an item called Vinyl Dust that will spawn when a disc is crushed by an anvil. Since anvils destroy any item they drop on I assumed it would trigger a "gem expire" trigger, but apparently not? Would anyone know how to implement a feature like that with the procedure blocks? I have been stumped on this one for a quite a while and I haven't really found anyone else trying to do something like this.