He was born in 1924 in Milan. Known as Grasso (translated: "fat").
Mario Tosi started working from a very young age at the Conterie before arriving at the famous Venini glassworks in 1937 where he stayed until the early 80's as one of the company's most important masters, collaborating with famous deignes including Carlo Scarpa and Tapio Wirkkala . His filigree's works are highly precious.
He died in 2004.