What rock do you pick when you can't decide on a colour? Rainbow petrified wood from Arizona, that's what. Photograph ALL the colours! This will need a spot of tinkering to bring out its best, but it's got great potential for animal prints, aurorae, and snow-clad forest. I love rocks. But you probably noticed that.
ETA +1 image
The camera did some odd things with brightness here, but that's what post is for.
Couldn't resist a bit of post. Another candidate for deep space: