"The finest extracts from the dumps," Paul said, "iron, aluminum, copper, and such—their market value crashed once modern materials came into production. Cheap diamond of course, cheap diamond beats anything. But sugarglass, optical plastics, fullerenes, and aerogels"—he gestured at the cityscape around them. A small deft man with a proprietarial interest in structures four hundred stories tall. "The carbon-based products drove construction metals off the market. People in Stuttgart are progressives, they despise the shibboleths."