Have you ever watched an Olympic ceremony and wondered — why on Earth are those athletes biting their medals?
Welcome to FreeAstroScience.com, where we explain complex ideas in simple, honest language. We're glad you're here. Whether you stumbled on this article during your morning scroll or looked it up after watching the Milano-Cortina 2026 Winter Games, you've come to the right place.
We're Gerd Dani and the FreeAstroScience team. We believe science isn't just for laboratories. It lives in everyday moments — even on an Olympic podium. That familiar image of a grinning athlete clamping down on a shiny gold disc? There's actual chemistry, history, and even a bit of drama behind it.
Stick with us to the end. We promise you'll never watch a medal ceremony the same way again.
📑 Table of Contents
Where Did the Medal-Biting Tradition Come From?
The answer takes us centuries back — long before stopwatches, photo finishes, and doping tests.
Merchants in the ancient and medieval world had a simple problem: How do you know a gold coin is real? They couldn't run it through an X-ray machine. So they bit it .
Miners did the same with gold nuggets. The logic was straightforward. Pure gold is a remarkably soft metal. If you pressed your teeth into it, you'd leave a visible mark. If the coin contained harder alloys or was a fake, your teeth would just slide off — no dent, no deal .
Think of it as the original quality-control check. No fancy equipment needed — just your jaw.
How exactly this habit jumped from the marketplace to the Olympic podium? Nobody knows for sure. It's one of those beautiful mysteries where history blurs into ritual . But jump it did, and today it's one of the most recognizable images in sport.
How Does the Gold Bite Test Actually Work?
Here's where the physics gets interesting.
Every solid material has a property called hardness — its resistance to being scratched or deformed. Scientists measure this on something called the Mohs Hardness Scale, developed by German mineralogist Friedrich Mohs in 1812.
The scale runs from 1 (the softest, talc) to 10 (diamond, the hardest natural mineral). Pure gold scores around 2.5 on the Mohs scale. That's about the same hardness as a human fingernail — and softer than your tooth enamel, which sits at roughly 5.
So when a merchant bit a gold coin, the math was simple: tooth enamel (≈5) is harder than pure gold (≈2.5). If the coin dented, it was likely real. If it didn't, trouble was ahead .
The Mohs Hardness Scale — Key Materials Compared
Table by FreeAstroScience.com | Data based on the standard Mohs Hardness Scale (1812)
Here's a handy way to remember the relationship. In materials science, one object can scratch or dent another only if it's harder. We can express this as a simple rule:
The Bite Test Principle:
If Htooth > Hmaterial → a dent appears (material is likely soft gold)
If Htooth < Hmaterial → no dent (material is harder, probably an alloy or fake)
Where H = Mohs hardness value of the material
Of course, this test wasn't perfect. Lead, for example, scores just 1.5 — even softer than gold. A clever counterfeiter could plate lead with gold, and the bite test would still leave a mark. But for everyday trade, it worked well enough to survive for centuries.
Why Do Athletes Still Bite Their Medals Today?
Let's be honest — no one on an Olympic podium is genuinely checking if their medal is real. So what gives?
The short answer: photographers.
Several Olympic champions have admitted in interviews that journalists and photographers explicitly ask them to bite the medal during the official photo session . It makes for a dramatic, instantly recognizable shot. And let's face it — the image of a teary-eyed champion with a gold disc between their teeth tells a complete story in a single frame.
Over time, what began as a practical test became a visual tradition — part of the collective imagination of the Games . New athletes see their heroes do it. They grow up watching it. And when their own moment arrives, the bite feels natural, almost instinctive. It's a way of saying: "This is real. I'm really here."
The tradition carries an emotional weight that goes beyond chemistry. It's a gesture of disbelief, joy, and ownership all at once.
What Are Olympic Gold Medals Really Made Of?
Here's a fact that surprises many people. Olympic "gold" medals aren't solid gold. They haven't been since 1912.
According to the International Olympic Committee's official guidelines, a gold medal must:
- Be made of at least 92.5% silver
- Contain a minimum of 6 grams of gold as plating
- Weigh at least 500 grams in total
So the gold medal hanging around a champion's neck is mostly silver — covered in a thin layer of gold. It makes sense: a solid gold medal of the same size would cost tens of thousands of dollars and would be impractically heavy.
Table by FreeAstroScience.com | Based on IOC Charter specifications
So if an athlete were actually testing their gold medal with a bite, the thin gold layer might dent — but they'd quickly hit the harder silver underneath. Not exactly what those old merchants had in mind.
The Milano-Cortina 2026 Medal Controversy
Now, here's where things get dramatic.
At the 2026 Winter Olympics in Milano-Cortina, the medals faced a real-world stress test far tougher than any bite. Athletes started reporting that their medals were falling off their necks and crashing to the ground — right after the ceremony .
Imagine it: you've trained your entire life. You stand on the podium, tears in your eyes, national anthem playing. Then your medal detaches from its lanyard and hits the floor with a clang. Not exactly the moment you dreamed about.
What Went Wrong with the Medals?
The problem was traced to a safety mechanism in the hook connecting the lanyard to the medal. This clasp was designed to release under strong traction — a precaution meant to prevent choking if the lanyard got caught or pulled too hard .
Good intention, bad execution. The release triggered too easily, causing accidental and often immediate detachment. Several athletes reported damage to their medals after these sudden drops .
How the Italian State Mint Fixed the Problem
The medals for Milano-Cortina 2026 were produced by the Istituto Poligrafico e Zecca dello Stato — Italy's official State Mint. Once the issue surfaced, the Fondazione Milano-Cortina responded quickly .
The Zecca dello Stato developed a fix: a second safety system that works alongside the original anti-choking mechanism. This secondary lock makes the hook more secure without disabling the first safety feature . All athletes who experienced problems were invited to come forward and have their medals repaired.
It's a good reminder that even the most celebrated objects in sport aren't immune to engineering challenges. Design always involves trade-offs — and sometimes, the first version needs a patch.
What Can the Medal Bite Teach Us About Science?
You might think this is just a quirky sports tradition. But look closer, and there's a real lesson here.
The ancient bite test is applied materials science in its most basic form. Those merchants and miners — without any formal education in physics — figured out a practical way to test material hardness using nothing but their bodies. They understood, intuitively, that different materials respond differently to pressure.
That same principle now drives modern engineering:
- Aerospace engineers select alloys based on hardness, weight, and heat resistance.
- Jewelers use the Mohs scale daily to distinguish gemstones.
- Dentists choose filling materials that match the hardness of natural enamel.
From a merchant's teeth to a materials-testing lab — the core idea hasn't changed in thousands of years. Only the tools have gotten fancier.
Final Thoughts
So the next time you see a champion bite a gold medal on TV, you'll know the full story. It started with merchants in dusty markets, testing coins with their teeth because they had no other option. It survived through gold rush miners, passed into the sporting world through some unknown chain of tradition, and lives on today — mainly because photographers love the shot .
And at Milano-Cortina 2026, those medals got tested in ways nobody planned. A safety hook that was supposed to protect athletes ended up damaging the very prize they'd earned. But the engineers adapted, just as humans always do .
There's something beautiful in that. Science isn't just equations on a chalkboard. It's in the way gold yields under pressure, in the engineering of a tiny clasp, in the hardness of your own teeth. It's everywhere — if you know where to look.
That's what we do here at FreeAstroScience.com. We take the complex and make it clear. We believe you should never switch off your mind — keep it awake, keep it curious, keep it questioning. Because, as Goya warned us, the sleep of reason breeds monsters.
Come back anytime. There's always something new to explore.
— Gerd Dani, President of Free AstroScience – Science and Cultural Group
This article was written and curated by FreeAstroScience.com, where complex scientific principles are explained in simple terms — for everyone, everywhere.
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