Rompentrix, the Vertical SmileThis is a subset of the Starminx with two axes, both with a traditional cut and one cut deeper than the origin, in which a rhombus, pentagons and triangles appear.
Rota-RiusTwo very small circles and one plunger with six tiles.
RotaPlusThe Rotascope with the central piece unbandaged.
RotoidFour intersecting circles making up an enhanced version of the Rotascope.
Rotoid PlusFour intersecting circles making up an enhanced version of the Rotascope, with two pieces split up further.
RoundaboutOne rotation with four rings of marbles that can be combined into one continous ring.
Rub el HizbOne circle rotating by 45° plus one plunger to exchange pieces.
Ruby CuboidA Ghost 2x3x4. The second out of a series of three.
Rugby kubeA 2x2x2 (a bumped one) in shape of a rugby ball.
SPAX TetraA Spax Cube transformed into the shape of a tetrahedron.
Satelite 1x2x3A 1x3x3 with two additional circles rotating with a side turn.
Satelite 2x3x3A 2x3x3 with eight additional circles rotating with a side turn.
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