That is true, Lewis never went into detail about things as much as Tolkien did but Lewis had several different amazing book series in addition to Narnia where (though I'm not the expert) Tolkien didn't have so many
I was discussing with Twilightdryadhobbit once whether I would want to get one of the rings from the Lord of the Rings for an engagement ring, I think I'd consider it if it was Aragorn's ring (the name slipped my mind for a moment) or Nenya. However getting the One Ring as an engagement ring might have some unwanted side effects like over-possessiveness....
I happen to have one from board game too.. and when I hold it I can't help but feel.. empowered and possesive.
What's happening on September 27th?