The RotoCrystal puzzle is based on similar geometry to my Fracture-10 puzzle. It is actually a shape modification of what might be called "Fracture-12", or a hexagonal dipyramid. I found the RotoCrystal shape to be more aesthetically pleasing since the visible core parts are more in proportion to the rest of the puzzle. RotoCrystal does shape shift, but it does not technically jumble.
The RotoCrystal puzzle comes as a DIY kit of parts, and you will need to supply your own stickers. The templates for the stickers are available in the instructions forum.
I recommend that you purchase the puzzle in "Black Strong & Flexible". It costs a bit more than the white material, but it's worth it since the finished puzzle will look and work better. All of the parts snap together, so no additional screws, springs, or other hardware are required.