In 1855 C. Müller published the first volume of his Geographi Graeci Minores: in the introduction to the ‘Periplus of the Erythraean Sea’ he states that he has studied six hundred writers on the question’ what was murrhine, but that it may be now regarded as certain that murrhine vases were made of fluorspar’. Since, however, the opinions which Müller discarded have been revived by writers entitled to respectful consideration, some of whom have also given reasons for rejecting the identification with fluorspar, it seems desirable to review the matter and to put on record certain new evidence.