An attractive Roman pale green miniature flask with beautiful green and blue iridescence and marbled appearance. Its piriform body with slightly concave base narrows to a short conical neck that then widens to an asymmetrical everted rim.
The word iridescence comes from Iris, the Greek goddess of rainbows and refers to rainbow-like colours seen on glass. It is caused by alkali being leached from the glass by acidic water and then forming fine layers that eventually separate slightly or flake off, causing a prism effect on light bouncing off and passing through the surface which reflects light differently, resulting in a rainbow-like appearance such as the one on this flask.
Period: 1st – 3rd century AD