I'm sorry if this is an out of topic and maybe hard to understand question.
I once came upon this cursor theme on Ubuntu GNOME after installing a package which required some KDE dependencies. It installed along a cursor theme which is the most pleasant I've ever seen, but I always have trouble finding it again after a fresh install.
If I remember well, they have very similar shape but the one I'm looking for is a bit more simplistic. What I really remember is the loading icon, which smoothly changes the cursor into a colorful spinning circle, something like this:
Sorry about this overly ridiculous drawing, though it's quite hard to describe an image just from memory.
I hope it's understandable.