Penrose CubeA 3x3x3 truncated into three round surfaces in a spiral pattern.
Penrose Fisher cubeA shape variant of a shape variant: A Fisher Cube treated like a Penrose Cube.
Penrose SkewbA Skewb truncated into three round surfaces in a spiral pattern.
Pine ConeA skewb in a shape resembling the puzzles name.
Rex BiconeA Rex Cube truncated and extended into the shape of a bicone.
Sílex cubeA 3x3x3 truncated on six edges and afterwards extended. Unlike the variant with Sharp Edges the cuts are rounded.