The problem with having stone artefacts indoors is that there’s no natural ‘cleansing process’ (as there is if they're outdoors) consequently you get a build up of fats and acids that cause havoc to the object. It’s astonishing to still see people on TV handling precious books, manuscripts and objects with their bare hands.
We’ve had this debate before, some claiming it’s safer not to ware gloves when handling precious objects – it is not safer. Nor is it safe to eat or drink anywhere near such an object - so there :-)