Monthly Art piece

Roman glass　　　　　　Ancient Roman era・Roman empire(BC27～AD325)
In BC, glass was tare and precious possessed only by nobles, however, innovation in the Roman empire(BC27～AD325) made them spread to ordinary citizens. The glasses thrown away when the empire collapsed occurs smoltification, through more than 1,000 years underground. Smoltification is chemical reaction combining glass with iron, copper and magnesium contained underground, creating pale glass film, a phenomenon not able artificially. The glass film shines iridescent when illuminated by light.