The DaYan Gem IV Cube is made with a high quality black plastic core. The object of this puzzle is to scramble up all of the edges and the return it so that each face only has one color on it. This puzzle is unique because it has 14 different colored faces, of which only the 8 larger rotate, providing an extra challenge. Also, this puzzle has an interesting shape because the 8 rotatable faces have 6 edges and the other 6 faces have 4 edges.
The Gem IV Cube is one of many great puzzles manufactured by DaYan.