Material   Refractive Index
                                              Air   1.000 298
                                  Carbon Disulphate 1.63
                                          Diamond   2.42
                                     Diiodomethane  1.74
                                       Glass, Flint 1.53 to 1.96
                                      Glass, Crown  1.48 to 1.61
                                          Glycerol  1.47
                                              Ice   1.31
                                          Paraffin  1.42
                                            Ruby    1.76
                                            Water   1.33