Quartz is too fancy for a black market.
Here in Chicago, there's a central district with rail terminals, tall modern buildings, and historic structures and areas. Outside of that, there's a generally older, run down residential neighborhoods consisting of grids of smaller brick homes with a park every few blocks, as well as dozens of rail yards and industrial districts. Outside of that, there's forest preserves, suburbs, O'Hare Intl, more rail yards, etc.