It takes days to get from the smuggler city to the wind-blasted mountains where the crystal farmers dwell near a huge network of mineshafts. Down below, it gets hotter and the pressure rises. It is hazardous to reach the luminescent fields of crystal in the deepest caves. The farmers harvest the precious raw material: this is all they have to trade. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Their subterranean work clothes show the influence of both local village culture and the distant metropolis.