Both ambers are among the most ancient substances that man traded between Europe and China. Both belong to all the ancient pharmacopoeia and both were eaten and burnt as incense. I had a big surprise burning the Ambergris when I felt it's typical fragrance unchanged from the heat of coals despite its animal origin. This explains somehow the large degree of confusion to which is confronted the researcher in the literature about Amber, and the investigator can easily be disoriented because informations about Amber are hidden more than revealed in the ancient books, rather like a secret of alchemy.