zingnites

zingnites [? corruption of CL lychnites < λυχνίτης], kind of vitreous stone, said to have magical properties. ~es lapis est vitrei coloris qui gestatus in collo valet contra nyctalopam et sanguinem stringit et mentis alienationem repellit, et si tenetur ad lignum accensum, extinguitur flamma ejus [cf. Damigeron De Lapidibus 28] Bart. Angl. XVI 104.