You've heard the tale of turning base metal into gold — but you've definitely never heard this one:
In 3rd‑century Egypt, someone mixed lime, sulfur, and "a young man's urine," boiled it into a red liquid, dipped in a piece of silver — and pulled out gold.
This isn't myth, nor fiction. It's a real recipe written on papyrus, now kept in the Leiden Museum under the catalogue number "Leiden Papyrus X."
It says, plainly and straightforwardly:
"Take lime and sulfur, grind them to powder in equal amounts. Put them together in a vessel. Add pungent vinegar or the urine of a young male. Heat from below until the liquid looks like blood. Then filter it and use it pure."
No magic incantations, no wizards' wands. Just an ancient "technical manual."
🔺Is it real? I tried it.
Of course, we can't really cook with ingredients from centuries ago, but modern historians of science have actually run this experiment.
They mixed lime, sulfur, and the urine of a young volunteer (vinegar didn't work as well as urine), heated the mixture and boiled it for about an hour. The room filled with a pungent mix of rotten eggs and ammonia — eye‑wateringly strong.
But then something marvellous happened. The liquid turned dark red, like blood.
Next, they dipped a polished silver plate into it. The surface quickly changed colour: first yellowish‑brown, then golden yellow, then coppery, bronze‑like, purplish, and finally dark brown.
The most astonishing part: throughout the entire process, the silver's lustre never dimmed. It looked exactly like gold — that heavy, noble kind of golden hue.
This isn't magic. The principle is simple:
Sulfur and lime, under the action of ammonium salts in urine, produce calcium polysulfide. Silver reacts with the polysulfide to form an extremely thin, transparent sulfide film on its surface.
That film acts like a prism, reflecting light in such a way that it shows the exact colour of gold. And because the film is so thin, the underlying metallic sheen of the silver shines right through — so it looks like solid gold.
In other words, this was an ancient version of "electroplating" — done with chemical reactions instead of electricity.
🔺The craftsmen weren't out to cheat.
You might say: isn't that just counterfeiting?
But in those days, the craftsmen didn't think of themselves as deceivers, and their customers knew these were imitation pieces.
The luxury market in antiquity was quite peculiar: ordinary people couldn't afford real gold, real gems, or real purple dye, yet they still wanted decorative items. So the craftsmen openly produced "substitutes" — artificial pearls, imitation gemstones, gilded copperware.
These products were clearly priced, and both buyers and sellers knew exactly what they were getting.
The Leiden Papyrus doesn't just give recipes for fake gold — it also includes testing methods:
How to use a touchstone to tell whether a metal is pure gold or just gilded?
How to test the purity of silver with vinegar and urine?
This shows that the craftsmen understood the difference between genuine and fake perfectly well. They were simply using their skills to let more people enjoy "beauty."
This was an ancient "budget‑friendly solution" — and also trade secrets. That's why the text on the papyrus is terse and cryptic, written only for those in the know — these were ancestral recipes passed down from master to apprentice.
🔺Then, someone wanted to go further.
At some point — around the 3rd century AD — one of those craftsmen, crouching by the furnace and staring at that gold‑coloured silver plate, suddenly had a thought:
"If the surface can turn golden, why can't the whole piece of silver become gold? Why can't I turn this silver into real gold, inside and out?"
That thought was the birth of alchemy.
From that moment on, "imitation" turned into "transmutation."
Craftsmen were no longer satisfied with making things that looked like gold — they wanted to create real gold.
So they began to ponder the nature of matter:
What is a "metal"? Why do some metals have gold's colour and others don't?
If you could extract a metal's "soul" and pour it into another metal, would that transform it into gold?
That idea was, of course, scientifically wrong — but that very "wrongness" drove over a thousand years of experiments, records, and exploration.
From alchemy, chemistry was born.
Distillation, crystallisation, calcination, sublimation — these basic laboratory operations today were all invented by alchemists.
They never found the stone that turns lead into gold — but they found the building blocks of modern science.
🔺Your "impractical" ideas also hide a path.
Today, looking back at the "urine‑into‑gold" recipe, we find it amusing and naive.
But back then, craftsmen started with a golden film on a silver plate, and step by step, they kept asking: "How can I make the whole thing truly golden?"
Though they never found the answer, on that quest they discovered countless new substances, new reactions, and new tools.
You're the same. You surely have some thoughts in your mind that don't sound very practical —
"I want to make a living by painting."
"I want to create a product nobody has ever made."
"I want to live a different life."
You're afraid to tell anyone, for fear of being questioned.
But those thoughts are just like the ancient craftsman's "golden surface." They may seem to float only on the outside, yet they could be the very first testing ground for your own personal "transmutation."
You don't need to turn into real gold overnight. You just need to start with a bit of urine, some lime, a pinch of sulfur. The most absurd, most rudimentary first step often holds the entrance to the path ahead.
So — would you dare to give it a boil first?
