All sorts of worlds to transform

ooh, shiny marbles!

You can start with Barren worlds, looking desolate just like our moon.

But you might have left out a more horrifying beginning, Molten worlds, like the sun-side of tidally locked Mercury, or the nip-tucked by Jupiter, yellow Volcanic satellite of Io. Little better are Corrosive fluids flowing across planets, pooling into extremely Acidic.

So cool down, and yield Metallic planets, or break up into dead rings, to yield Gem rockballs.

Still if you seek seething energies beneath surface, you might transform Radiated surfaces to cover as hot Desert, to improve into the more Arid, and transform into Plains.