a.k.a. Diamond Octahedron
Purchased from the Cuber Shop, Tiawan, 2009.
(plastic, 2.25 inches between faces, 4 inches point to point,
opposite faces white / yellow, orange / black, magenta / blue, green / red)

A larger version of the Skewb Diamond; this is a different puzzle than the Octahedron. Rotation is not about the points of the diamond; rather it is along each of the four sets of two planes that divide the puzzle between opposite faces: