Spunstone is unique material, once used by the Nonmen to create textiles of amazing tensile strength. The techniques needed to create spunstone have since been reclaimed by the Delvers, and is a closely guarded secret. It is known to require the refinement of plumbago, but beyond that the lore behind its creation is entirely unknown. In its raw form it is a fine, black powder, but is most often seen bonded to various fabrics.
Spunstone is used to create Dweomsprings, armor for the exceptionally wealthy , and has been used to create ropes needed to make suspension bridges and mining equipment.