Children will have fun breaking away the rock to find out what's inside with this Chip Away Diamond Science Kit by Schylling, CHAD. The box includes a hammer and a chisel, that they can use together to penetrate the surface and reveal the hidden specimen and a brush to clean it. The dig for diamonds toy contains a red onyx, picture jasper, black line jasper, tiger eye, volcano rock or a rose crystal. And one box in 24 contains a real diamond.