Related
A single sheet of what appears to be magicked uterine vellum torn from a quire bound within an ancient tome.
Crafting Material
Value
35 gil
Aged Vellums are obtained by desynthesizing Aged Grimoires as a Leatherworker. The base item is cheap (3,000 gil) but has an item level of 55, so you will most likely have to purchase it or most of the other desynthesis items required to create your relic.