The Finely Ground Bone Meal is a quest item found in The Elder Scrolls V: Dawnguard. It is a quest item for the quest "Chasing Echoes." It can be found in the old laboratory of Serana's mother, Valerica. It lies on top of the table with the Alchey lab on the west side of the chamber. This, together with the Purified Void Salts and Soul Gem Shards, can be used to activate the portal to the Soul Cairn.