Artifacts
"Artefacts" is a catch-all term for items whose function is mysterious to the current human inhabitants of Raana. It includes items from old Earth, which might be banal but of historical interest, or potentially functional but useless without the required technology to support them. It also includes items discovered on Raana which appear to be artificial in nature - e.g. the "Beryll pottery", presumed to have been made by an unusually advanced culture of the the "Beryll Monkeys" several hundred years ago, and possibly also items older and more advanced than this, which some attribute to "aliens".