jewelery produced and stored is not necessarily jewelery used. jewelery inflates speculative portion as much if not more as other instruments you listed and if

jewelery produced and stored is not necessarily jewelery used. jewelery inflates speculative portion as much if not more as other instruments you listed and if gold was stripped of it's exchange value, most of the jewelery in the world would be up for sale to recover at least some of the "investment" (even if that investment was inherited, which it is in vast majority of cases).