This blown and molded wide-mouth jar has a white oval baked enamel label that is surrounded by a blue ribbon and topped with a golden crown. The jar is marked MAGIS MARGAS in black text. The jar would have contained Magisterium Margaritae, which is a formed from the reaction of pearls in an acid solution. Pearls were ground into powders and mixed in an acidic solution that was then used as a cordial and tonic.