The Doorsill

My next carpentry project is the 'sill' at the bottom of my front door - after our builder left I found the old wooden bit below the door frame in really poor condition (powdery and so frail I just pulled it out with my fingers. But underneath I found an old level of flooring make from polished stone; presumably from a much older version of my house.

I'm replacing the step but think I have to get a bit creative with the old flooring and show off this old stone.