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 designers including Carlo Scarpa and Tapio Wirkkala . His filigree's works are highly precious.
He died in 2004.


  • Dan Siddall
    Jun 20, 2022 at 08:11

    I am trying to find more out about this beautiful piece of glass made in 1961 and signed by Romano Tosi, the founder of the famous FRATELLI TOSI Venitian mirror making firm. I can’t find any pieces made by Romano only by other members of the family and nothing as old as this piece. It stands about 21cm high, is in excellent condition and undamaged,- if a little dusty. It’s my mothers and I need to insure it. Any ideas of rarity and value? It’s not just value, it’s also about the maker, the company website has little about him and I’m struggling to find much else- I’d also like to see other examples of his work. I found that Romano once worked in the V.A.M.S.A. glassworks, as a master-craftsman, better-known as “Mamaracio”. Great names such as Walter Furlan were apprenticed to him there in the early 50’s. All the pieces I’ve seen online have been many £££££ but none of them look anything like this more traditional style. Any help much appreciated Thanks in advance. The images can be found in my post here:

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