Residuum

Residuum is the magical substance that results from using a Disenchant Magic Item ritual on an item. It’s a fine, silvery dust that some describe as concentrated magic, useful as a generic component for spells and rituals. In some exotic locales, residuum is traded as currency, measured by weight and carried in small metal vials. It’s a convenient way to transport large sums of wealth; 10,000 gp worth of residuum weighs as much as a single gold piece and takes up only slightly more space, so 1 pound of residuum is worth 500,000 gp and fits in a belt pouch.