This is a rainbow geode, I enjoyed the picture so much that I looked into it just a bit. You can too at: https://en.wikipedia.org/wiki/Geode. I have seen many other geodes before, but none quite so colorful as this.
Remember...
Psalm, Chapter 8 (WEB)
who has set your glory above the heavens!
because of your adversaries, that you might silence the enemy and the avenger.
the moon and the stars, which you have ordained;
What is the son of man, that you care for him?
and crowned him with glory and honor.
You have put all things under his feet:
yes, and the animals of the field,
and whatever passes through the paths of the seas.
how majestic is your name in all the earth!
How anyone can think that everything in this world just happened by accident amazes me!!! God is the greatest artist- ever!!!!