Celtic FraudIt seems to be another Celtic Cube but it is a doubled version of the 4 Corners Cube.
Celtic TetrahedronThe first tetrahedron with the axis system of an edge turning hexahedron.
Cheese BlockA prism with 3 layers, 14 segments and the shape of a cuboid.
Cheese CrystalA one-layer cheese with 10 segments in shape of a rhombic icosahedron, a shortened rhombi triacontahedron.
Cheese SlideA deepcut prism with three cuts and three layers and a shell of pieces with one moving hole.
Chilen CubeA two-layered pentagonal prism with spherical cuts.
Chimera (4x4x6x6 cube)A combination of a 4x4x4 and a 6x6x6. Inspired by Tony Fishers V-Dome and implementing two AI-Cubes.
Chopasaurus Jr.Looks like a Master Brillic but it twists around its corners.
Chroma StarA Kilominx in shape of a Rhombic hexecontahedron.