| Heading Codes | 
                                                Heading Description | 
                                            
											
                                                                                                
                                                
                                                
                                                                                                    | 25120010 | 
                                                    Siliceous fossil meals (for example, kieselguhr, tripolite and diatomite) and similar siliceous earths, whether or not calcined, of an apparent specific gravity of 1 or less:Kieselguhr                                                												
												 | 
                                            
                                                                                                
                                                
                                                
                                                                                                    | 25120020 | 
                                                    Siliceous fossil meals (for example, kieselguhr, tripolite and diatomite) and similar siliceous earths, whether or not calcined, of an apparent specific gravity of 1 or less:Tripolite                                                												
												 | 
                                            
                                                                                                
                                                
                                                
                                                                                                    | 25120030 | 
                                                    Siliceous fossil meals (for example, kieselguhr, tripolite and diatomite) and similar siliceous earths, whether or not calcined, of an apparent specific gravity of 1 or less:Diatomite                                                												
												 | 
                                            
                                                                                                
                                                
                                                
                                                                                                    | 25120090 | 
                                                    Siliceous fossil meals (for example, kieselguhr, tripolite and diatomite) and similar siliceous earths, whether or not calcined, of an apparent specific gravity of 1 or less:Other                                                												
												 |