That ill-luck and good-luck are relative terms is shown us published of an opal by Paris newspapers. A shopgirl, plainly clad, in crossing the Place de l’Opéra, when the street traffic was at its greatest, stopped at one of the “refuges” halfway across the street. To the girl’s great surprise, an elegantly attired lady standing there slipped an opal ring from her finger and gave it to the girl, who took it to a jeweller’s shop to sell it. Here she was arrested on suspicion of having stolen it. The magistrate before whom she appeared was inclined to believe her story and ordered a “personal” in a widely read journal asking the lady to clear the girl of the charge. A titled lady presented herself, substantiating the girl’s statement. She feared ill-luck would befall her if she wore or kept the ring, which was returned to the shopgirl. A possible explanation of the superstitious dread the opal used to excite some time ago may be found in the fact that lapidaries and gem-setters to whom opals were entrusted were sometimes so unfortunate as to fracture them in the process of cutting or setting. This was frequently due to no fault on the part of the cutters or setters, but was owing to the natural brittleness of the opal. As such workmen are responsible to the owners for any injury to the gems, they would soon acquire a prejudice against opals, and would come to regard them as unlucky stones. Very widespread superstitions have no better foundation than this, for the original cause, sometimes a quite rational one, is soon lost sight of and popular fantasy suggests something entirely different and better calculated to appeal to the imagination. The belief that the diamond fractured the teeth if it were put in the mouth, and ruptured the intestines if it were swallowed, already appears in pseudo-Aristotle,[220] and can therefore be dated back to the ninth and perhaps to the seventh century. This fancy evidently owes its origin to the fact that the diamond, because of its hardness, was used to cut all other stones, and the idea of its destructive quality was strengthened by the old legends regarding the venomous serpents which guarded the place where it was found. Hence the firm conviction that it would bring death to any one who swallowed it.