Murano Glass — what is it and how to recognise it?

Glass seems to be inseparable from Venice. Yet the Venetians did not invent it — they simply detained it on their atoll for centuries, putting it to work in building their fortunes. They confined its secrets, its masters, its furnaces. It was, however, a remarkably creative kind of captivity — one in which glassmaking techniques evolved significantly. And it seems that, through specific chemical formulas, the Venetians managed to give it something almost magical.

If the Venetians did not invent glass, where does it actually come from — and what is it?

Glass has been known to humanity for several thousand years. The earliest archaeological finds in Mesopotamia and Egypt date back to the second millennium BC. Its production requires four basic components: quartz sand, limestone, soda, and very high temperatures — above 1500°C. And this is where the real challenge begins: achieving such heat, and then maintaining it consistently over time, was anything but simple. In practice, it was only from the Iron Age that people began to handle such processes with any real control.

Around 900 BC, in Syria, techniques for producing transparent glass were refined — let’s say: something closer to what we know today. The Romans, who loved everything beautiful and drew freely from the vast resources of their empire, quickly adopted these methods and developed production on a large scale. Glass was also known and produced in Byzantium and in the Middle and Far East.  By the time it reached Venice, it already had a long history and multiple production methods behind it.

The Venetians quickly recognised its extraordinary properties — its ability to work with light: to reflect it, transmit it, and above all, to amplify it.

In the dark Middle Ages — both literally and metaphorically — the ability to create objects that interacted with light, whether decorative or functional, made glass exceptionally desirable. And expensive. Thanks to their trading skills and strategic position between East and West, the Venetian Republic began developing glass production and trade almost from the very beginning of its existence.

By the 13th century, glass had become one of Venice’s main sources of income. This was also when the changes began that would eventually lead to the famous Murano glass. First, glassmakers’ guilds were established — from that point on, not just anyone could open a furnace. In 1271, the import of glass from outside Venice was banned. The most decisive step, however, was moving production to the island of Murano — in fact, an archipelago of seven small islands connected by bridges, located about one kilometre from Venice.

Officially, this decision was justified by concerns over fire safety in the city’s largely wooden architecture. In reality, the motives were likely different — control over technology and production secrets. This is confirmed by the fact that in 1295, guild members were forbidden from leaving the island. Glassmakers, despite their many privileges, could not legally relocate elsewhere.

This is where the story of Murano glass begins.

What made it so exceptional?

The key was the development of glass with prolonged plasticity. On Murano, the processes of cooling, blowing, and shaping were refined to near perfection. The longer the material remains workable, the more complex and refined the forms that can be created from it. This is why traditional Murano pieces so often resemble fantastical plants, animals, or flowers — full of detail and movement. They were demonstrations of possibilities that nowhere else in the world at the time reached such a level.

Murano masters also developed specific chemical formulas that allowed them to achieve intense colours: green through iron and chromium oxides, blue through cobalt and copper compounds, and violet through manganese and selenium.

There were, of course, many more such techniques and formulas. For those interested in this complex craft, I recommend this article: LINK

Murano also developed white glass as a response to porcelain imported from China in the 16th and 17th centuries.

Although glass was produced in other parts of Europe in that time — including Silesia and France — it was on Murano that the most complex, multicoloured, and artistic forms were created.

Venetian masters also played a crucial role in the development of mirrors. In the early 16th century, they patented a technique using a mercury-tin amalgam to create reflective surfaces. Until the invention of industrial silvering in the 19th century, most mirrors in Europe came from Venice.

We should also not forget the “cristallo “ technique, developed in the 15th century by Angelo Barovier. In the Barovier furnace, truly colourless, almost perfectly clear glass was achieved for the first time. Before that, glass typically had a greenish tint. Cristallo, in its own way, contributed to the development of science during the Renaissance — because it was used to produce… lenses.

It was likely from this very glass that the famous Lampada Sferica by Leonardo da Vinci was made — yes, that da Vinci. Like many of his ideas, it was ahead of its time, using glass and water to amplify light.

By the end of the 18th century, with the decline of the Venetian Republic and its subsequent takeover by Napoleon’s forces, the glass industry began to fall apart. The masters’ secrets were transferred to France, and guilds were dissolved. At the same time, industrial production was expanding, gradually replacing time-consuming manual techniques.

The end of the 19th century brought a shift in how the world was perceived. Art Nouveau, as a new aesthetic movement, rejected mass production and emphasised craftsmanship and artistic value. It was a good moment for glassmaking traditions to re-emerge. The real renaissance, however, came in the 20th century — particularly after World War II. This was when glassworks began collaborating with designers.

One of the key figures was Paolo Venini, who founded the company Venini in 1921. The goal was to combine traditional craftsmanship with modern design. Collaborations with some of Italy’s most talented designers — Gio Ponti, Carlo Scarpa, Ettore Sottsass — resulted in exceptional collections that remain highly sought after today and reach very high prices at auctions.

On the international stage, in the 1950s, 60s, and 70s, other glassworks also emerged — including Mazzega, Vistosi, and La Murrina — particularly through the production of lighting and chandeliers.

A renaissance was also experienced by one of the oldest glassworks — the already mentioned Barovier & Toso, founded in 1295 and continuously run by members of the same family ever since. After World War II, the company introduced numerous innovations and returned to the market with new designs — perhaps more than any other Murano workshop, while still strongly rooted in tradition.

Finally, the most important question: can we recognise genuine Murano glass?

Unfortunately, it is not that simple. The market for imitations is highly developed. What once bordered on magic — creating complex, multicoloured forms — can now be replicated on an industrial scale.

So what should we look for?

First — markings. Authentic pieces often have acid-etched signatures, labels, or workshop marks. These can also be forged, of course, but they still create an additional barrier.

Second — price. If a figurine costs 20–30 euros, it is almost certainly not Murano glass. Authentic pieces usually start at around 100–200 euros, and more often cost significantly more. Unfortunately, the highest number of fakes can be found in Venice itself.

Third — source. It is worth asking the seller about the origin of the object — which glassworks it comes from, and whether this matches the markings. It is also worth applying some common sense when evaluating both the price and the source. Genuine Murano glass has an almost hypnotic quality. Before making a purchase, it is worth getting to know original pieces and training your eye.

I wish you a chance to immerse yourself in the magical world of Venetian glass. If you have your own experiences or knowledge, I would be glad to read about them — as always, feel free to join the discussion.

Adam Krzemiński – CEO

Adam Krzemiński graduated with a degree in law, but his passion for archaeology led him to the discovery and restoration of furniture, which he treats as historical artifacts. He began by restoring antiques in Europe and the United States, but soon focused his attention on 20th-century pieces. In 2014, he founded Futureantiques—a company specializing in mid-century modern furniture and lighting. To date, items from the Futureantiques collection have found new homes with clients in over 27 countries, 400 cities, and across four continents.