Osmic Fragment

An Osmic Fragment is a quest item made of Fundamental Osmium, a super-dense metal from Savathûn's Throne World that comes from Fundament, the origin world of the proto-Hive. In Hard Evidence you bring it to The Hidden in the Enclave, match a sample in the Quagmire (interacting with it spawns Lucent Brood enemies) and log it on the Evidence Board. Osmic Fragments are also rewards for Hidden Reports.