When I manually dragged the artifact to my inventory and then moved to a new house, they retained their quality. HOWEVER, if I go back to an old save where I can still do that, then I lose a lot of outfits, etc. that my daughter and I spent a long time working on. ☹️
When I moved and chose "keep furniture" and let the game move the artifacts to my inventory, then they lost their quality after being carried to the new house.
If I save the room to the library and then place it in the new house, they lose both quality AND value.
That workaround solves it if used ahead of time ... but it's too late for me unless I want to lose a lot of progress. Dang it.
Same thing. Moved to a new apartment and artifacts became poor quality. Also noticed that un-authenticated artifacts revealed their quality.
