Dyckia sp from Lagoão-RS
This is a non described Dyckia species. Also it is one of the most mutant ones.
It well would be named The Rainbow one.
Clearly a Dyckia delicata affinis or a Dyckia delicata relative.
They are not that far apart from each other in habitat.
Lagoão is the name of the small town where it was found here South in Brazil