This fine pale blue Roman flask has a round body and a conical neck ending in flaring mouth. The base is flattened and very slightly concave. This piece has the colour of the glass in its natural state – bluish green that resulted from the iron oxide present in the silica or the sand. Most of the Roman glassware looked like this, while de-colorants such as manganese or antimony had to be added in order to produce transparent glass.
Period: 3rd – 4th century AD