Rhombic dodecahedron puzzle and multiple rhombic dodecahedron puzzle

A rhombic dodecahedron puzzle, comprising:

• a plurality of wooden puzzles arranged in a rhombic dodecahedron, and each of the wooden puzzles comprising:
• two unit elements connected to each other and being the same as each other, wherein each of the two unit elements has a plurality of surfaces, each of the surfaces has a diamond shape or a triangular shape, two of the surfaces having the triangular shape are connected to each other to form a concave shape;
• wherein the surfaces comprise a first surface, a second surface, a third surface, a fourth surface, a fifth surface, a sixth surface and a seventh surface, the first surface, the second surface and the third surface are connected to each other, the fourth surface and the fifth surface are connected to each other to form the concave shape, the fourth surface and the fifth surface are connected to the first surface and the second surface, respectively, the sixth surface is connected to the first surface, the third surface and the fourth surface, and the seventh surface is connected to the second surface, the third surface and the fifth surface;
• wherein each of the first surface, the second surface and the third surface has the diamond shape, each of the fourth surface, the fifth surface, the sixth surface and the seventh surface has the triangular shape, each of the two unit elements has a first vertex, a second vertex, a third vertex, a fourth vertex, a fifth vertex, a sixth vertex and a central vertex, and the central vertex is a central point of the rhombic dodecahedron;
• wherein three-dimensional coordinates of the central vertex, the first vertex, the second vertex, the third vertex, the fourth vertex, the fifth vertex and the sixth vertex are (0, 0, 0), (0, 0, 2), (1, 1, 1), (1, −1, 1), (2, 0, 0), (−1, 1, 1) and (0, 2, 0), respectively;
• wherein each of the wooden puzzles is one of a first wooden puzzle, a second wooden puzzle, a third wooden puzzle, a fourth wooden puzzle, a fifth wooden puzzle, a sixth wooden puzzle, a seventh wooden puzzle, an eighth wooden puzzle, a ninth wooden puzzle, a tenth wooden puzzle and an eleventh wooden puzzle, and the first wooden puzzle is in mirror symmetry with respect to the second wooden puzzle, and the third wooden puzzle is in mirror symmetry with respect to the fourth wooden puzzle, and the fifth wooden puzzle, the sixth wooden puzzle and the seventh wooden puzzle are the same as themselves after mirroring, and the eighth wooden puzzle is in mirror symmetry with respect to the ninth wooden puzzle, and the tenth wooden puzzle is in mirror symmetry with respect to the eleventh wooden puzzle.