Threshold flooring...what to use.

[Almondroca]

Hi,
I've been lurking here lately while we've been having a small extension built, but haven't posted before, but wondered if anyone had any bright ideas for this...

We've had a new room built and are going to be laying an oak flooring. The room meets two other rooms - one of which is carpeted and the other, trickily also has an oak floor. So where the two oak floors meet, what could we use as a threshold 'joiner'? They are similar finishes but obviously not exactly the same, so I'm wondering if it would be best to put something like a black tile or a border tile or something in between the two rooms to make it look clear that the two rooms aren't meant to match. The threshold is around 3 ft long and approx 7 inches wide.

Any ideas?

Could you use coir flooring, as a fitted doormat? So its actually fitted into the floor. Would only work between rooms where you may actually use a doormat e.g kitchen and sunroom.

If not then is there a big problem with different coloured oaks? In my mothers house she has an old oak floor in the kitchen, and the rest of the house has a new oak floor - the boards and colour are different and she has a trim at the doorway (think along the lines of the metal strip you have between carpets but made of wood) to mark them as seperate. I think it looks fine.

If you want tiles would you tile around the edge of the whole room rather than just where the 2 meet? I think they would look a bit lost just 3 or 4 tiles stuck there.