Alfredo Barbini Apple Bowl Murano Reactive Alexandrite Glass

MCM Minimalist Alfredo Barbini reactive color changing glass apple bowl from Murano Italy. It measures 6 1/2 inches wide and is most likely from the 1950's. Possibly signed by the stem but can't be positive. It appears to be a deliberate marking that is under the applied stem. The Alexandrite glass is made by adding rare earth Neodymium to the glass causing it to change color under different lighting. The green color is under fluorescent lighting and the purple color is under natural and LED lighting. This is a well known shape Barbini and documented in his catalogs from the mid century and in very good condition. It is not common to see it in Alexandrite glass. PG27