Huzzle Cast Marble - Difficulty Expert

This puzzle has such a beautiful shape that it could easily be mistaken for a piece of jewelry. Its surface features extremely unusual cuts; actually, this marble is a puzzle that can be broken up into 4 pieces. This advanced design is the creation of Bram & Oskar. If you succeed in breaking up the marble, carefully examine the surface of the sections of each piece.
The theme of this puzzle is “Sphere.”