@Gryphon has made me aware of this The Least Interesting Substance It is very close but I need a planet that can form naturally. Would any of the substances mentioned in answers to that question be realistic for a planetary body that had formed naturally?
The Planet Boros
I wish to create an incredibly boring world. It was visited once during a Galactic Survey but it was declared so boring that no-one has ever visited it since.
Question - Part 1
How can I have a realistic planet?
In Part 1 I am particularly concerned with the surface of the planet. I need a surface that (a) is unreactive (b) contains no useful minerals or sources of energy (c) does not create interesting (i.e. large) impact craters (d) is preferably of a grey or other neutral colour.
What substance should this surface be made of? Most importantly it needs to be able to form naturally.
Notes in response to comments
This is a dead planet with no possibility of supporting life. If water can be avoided completely then that is all to the good. Dry dust would be optimal. Preferably an atmosphere to blow the landscape flat and remove craters.