Carbon nanotubes, carbon spheres and slices of vertically aligned multiwalled carbon nanotubes (MWNTs) were synthesized simultaneously by chemical vapour deposition (CVD). Electron microscopy image showed carbon nanotubes were multiwalled carbon nanotubes, several micrometers in length. Carbon spheres were of uniform diameter (about 1 μm). Slices of vertically aligned multiwalled carbon nanotubes were about 5 mm in length, 3 mm in width and 8 μm in thickness. The interior of the slice was composed of densely packed, vertical aligned MWNTs, and faceted carbon beads. They were stable and easily separated from each other. The formation mechanism of slice was also discussed.