Mosaic gold: pigment, meaning and history

Mosaic gold is a yellow pigment made from tin(IV) sulfide, known for its metallic, gold-like appearance. It has been used since ancient times in bronzing and gilding wood and metal, and was once called aurum musivum by alchemists. Its use and recipes spread from China to Europe by the Middle Ages.

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Made from tin(IV) sulfide with a gold-like metallic shine
Known in China since the 3rd century AD
Called aurum musivum by alchemists
Used for gilding wood and metal
Sometimes confused with bronze powder or ormolu

What colour is Mosaic gold?

Mosaic gold is a pigment that looks like gold, but is actually made from tin(IV) sulfide. It forms a yellow, scaly powder with a metallic shine, giving a gold-like finish when applied to surfaces. This pigment is used in bronzing and gilding, especially for decorating wood and metal. Its appearance and use set it apart from true gold leaf or bronze powders, as it offers a similar effect without using precious metals.

Where does Mosaic gold come from?

The name mosaic gold comes from its historical use in mosaic art and its gold-like look. Alchemists called it aurum musivum or aurum mosaicum. The pigment was first described in a 3rd-century Chinese alchemical text, Baopuzi. In Europe, it appeared in North Italy in the late 1200s under the names porporina or purpurina, and by the early 1400s, artists like Cennino Cennini wrote about it. Its recipes spread widely, with many variations recorded by the 1500s.

How is Mosaic gold made?

Mosaic gold is made by heating a mixture of tin, mercury, sal ammoniac (an old name for ammonium chloride), and sulfur. The ingredients are ground and mixed, then heated in sand for several hours. After removing the unwanted upper layer, the gold-coloured pigment settles at the bottom. The main chemical formed is tin(IV) sulfide, which gives the pigment its colour and shine.

Where Mosaic gold is used

This pigment has long been used to give a gold appearance to wood and metal objects. It is applied in bronzing and gilding, where a metallic finish is needed but real gold is too costly. Mosaic gold was also used in mosaics and decorative arts, and recipes for its preparation were common in medieval and Renaissance Europe. In the past, it was even tried as a medicine, but this is no longer done.

Gold around the world

What the gold and metallics family means from country to country.

🇦🇪 United Arab Emirates

Dubai is called the City of Gold for its gold souk, a market of hundreds of jewellers. Much of what is sold is bridal jewellery for South Asian and Arab families.

Luck and prosperity Weddings and marriage Source: Dubai Gold Souk

🇦🇷 Argentina

The golden Sun of May at the centre of the flag recalls the May Revolution of 1810. Its face is linked with Inti, the Inca sun god.

Politics and protest Pride Source: Sun of May

🇨🇳 China

Gold stands for wealth. It is paired with red on New Year decorations, wedding invitations and shop signs to wish for a prosperous year.

Luck and prosperity Optimism Source: Color in Chinese culture

🇨🇴 Colombia

The Muisca made offerings of gold figures to the gods at Lake Guatavita. The ritual of a new ruler covered in gold dust gave rise to the legend of El Dorado.

Sacred and holy Awe Source: El Dorado

🇩🇪 Germany

The black, red and gold flag goes back to the democratic movement of the early 1800s and the 1848 revolutions. The colours are often traced to the uniforms of the Lutzow volunteers who fought Napoleon.

Politics and protest Pride Source: Flag of Germany

🇪🇬 Egypt

The ancient Egyptians held that the flesh of the gods was gold, which never tarnishes. Royal coffins and masks, like Tutankhamun's, were made of it.

Sacred and holy Royalty and power Awe Source: Mask of Tutankhamun

Shades and relatives of Mosaic gold

The term mosaic gold has sometimes been confused with ormolu (a gold-coloured alloy) and with bronze powder, which is made from real bronze. It has also referred to shapes cut from gold leaf and arranged in mosaics. However, true mosaic gold is the pigment based on tin(IV) sulfide, not actual gold or bronze.

Questions people ask about Mosaic gold

What colour is mosaic gold?

Mosaic gold is a yellow pigment with a metallic, gold-like appearance. It is used to imitate the look of real gold in art and decoration.

What is mosaic gold made from?

It is made from tin(IV) sulfide, produced by heating tin, mercury, sal ammoniac, and sulfur together. The process creates a yellow, shiny powder.

Where does the name mosaic gold come from?

The name comes from its use in mosaics and its gold-like look. Alchemists called it aurum musivum or aurum mosaicum.

How old is mosaic gold as a pigment?

It has been known since at least the 3rd century AD in China, and recipes for it appeared in Europe by the late 13th century.

Is mosaic gold real gold?

No, mosaic gold contains no real gold. It is a pigment made from tin(IV) sulfide that imitates the look of gold.

Good reading and sources

Where this page comes from

The facts on this page come from the Wikipedia article "Mosaic gold", written by its contributors and used under the CC BY-SA 4.0 licence, and from its Wikidata record (CC0). Rang rewrote the text in its own words, with AI assistance, and compares every page with the article to make sure no passage is copied. It may be reused under the same CC BY-SA 4.0 licence with a link back.

It may contain mistakes. The swatch is an approximation: named colours are not fixed standards, and every screen shows them a little differently. If something is wrong, tell us. Last refreshed 2026-10-03.

Mosaic gold