Answer by  
                                                                                          Darkephoenix (1789)
                                                            
                          
                          
                                                          Most likely you'd have to take it to a jeweler or someone who specializes in gemstones.  Keep in mind that untreated or heated gemstones are often a very different color from ones that are treated.  Certain stones are often treated to bring out a stronger color.  Any good jeweler should be able to tell you what you have.