How is the gold become dim! [how] is the most pure gold changed! The stones of the sanctuary are poured out at the head of every street.
"Her nobles"  (Lamentations 4:7-8).  These were the "upper crust" of Jerusalem's society.  They were the nobility, dressed in scarlet, living in extravagant luxury, faring sumptuously every day; and now!  During the siege, like everyone else, they were starving to death.