The D4 has a special teardrop shape but rolls normally.  Glitter is suspended in a liquid core and will move around while the dice are in motion.  The liquid core is hand placed in each shape and may not be perfectly centered. These dice are handmade, hand-polished, and hand-painted. They are very sharp. Please handle with care. Handmade dice may not be 100% perfect, and may have tiny imperfections. 7 Piece Resin Dice Set Includes:1-D4 (25mm)1-D6 (17mm)1-D8 (17mm)1-D10 (18mm)1-D% (18mm)1-D12 (19mm)1-D20 (22mm)