Another Illusionist's magic locket

Magic locket inspired by the scene in the film "the illusionist" and other designs. I made my own to get the same effect, more or less, using magnets to keep everything in place. Its size is 50mm x 20mm x 10mm and it has room to put a small picture divided in two (each 15mm x 15mm).
It can be transformed from an oval shape to a heart shape just by twisting one of the pieces and then you can open it to show the picture inside.