Hi, im going to Australia to enter Le Cordon Bleu. Im going to bring 4 of my naniwa whetstone too. But im a afraid that the custom will confiscate it since i cannot find any information about bringing whetstone there. What i know is that the any plant or animal related goods will be taken and destroyed. So , is it safe to bring my whetstone to australia? Will the custom in the airport confiscate it?