What Rocks Are Safe to Lick? The Dangers and the Rare Exceptions
                                
                                
                                •
                                
                                
                        
                                    
                                    6 min read                                
                            
                                Less than 1% of the over 4,000 known minerals are ever considered for a taste test by trained geologists, and almost all rocks are too dangerous to lick. What rocks are safe to lick is a question with a very clear, and dangerous, answer: almost none, with a couple of specific exceptions used strictly for field identification.