Lost Artifact Fragment

Lost Artifact Fragment is a grade 1 premium artifact fragment crafting material.

Source
Lost Artifact Fragments can be gathered from a Lost Archaeological Find node, which requires 25 skill in archaeology. They are most commonly found on Coruscant and  Dromund Kaas.

The following materials can also be found in Lost Archaeological Find nodes:

They can also be obtained from grade 1 archaeology missions. Additionally, there is a chance to obtain Lost Artifact Fragments from reverse engineering the appropriate level and type of gear.

Uses
Lost Artifact Fragments are used in several crafting schematics: