Voidsilk

Voidsilk is traded by the bolt, 2 kg a bolt, at a base price of 280 gold. Cities that make it sell it cheap; cities that want it pay more.

Voidsilk is an entry in the Trade goods database.

A city that makes a good sells it at 60% of base; a city that wants it pays 155%; exotic goods carry a further 40%. Prices drift by up to 12% a day, and a buyer's and seller's price differ by 8%.