Adding Honey and Salt: Grinding gold with a mortar and pestle is not unlike grinding beeswax: it tends to form together into clumps. For this reason, honey and salt are added to the scraps. I have no accurate reason for why these two ingredients work, but they are common household items. Perhaps the honey makes the gold stick in the bowl rather than flying away or clumping on the pestle, and the salt is granular enough to help pulverize the scraps. More importantly, they both dissolve in water.