The calcium carbonate (CaCO3) derived from the egg shell of hen and snail shell can be used as fillers in the polymer industries. CaCO3 was obtained from egg shell and snail shell, this was done by crushing the shell and sieving with a 60 micron mesh. This shell was calcinated in a furnace at 640 ± 10 oCfor 2 hours 30 minutes. The powder was characterised by Fourier Transform Infra-Red Spectroscopy (FTIR), Scanning Electron Microscopy (SEM) and X-Ray Diffraction (XRD). The SEM showed that the CaCO3 had an irregular shape while the FTIR spectra revealed peaks indicative of the presence of CaCO3. The XRD confirmed that CaCO3 was formed.