Olympic medals follow a specification tighter than most people assume, covering metal, size and much of the imagery. The rest is left to the host, and that is where the interesting choices happen.
The three-medal structure was not original
The first modern Games awarded prizes differently, and the settled arrangement of gold, silver and bronze for the top three took several editions to establish.
Standardizing it made results comparable between Games and created the medal table, which is a later invention with its own political life.
It also fixed the number of athletes who leave with something, which shapes how every event is reported and remembered.
Gold medals are mostly silver
The gold medal is required to be silver with a gold coating, a rule that dates from a period when solid gold became impractical to supply.
The weight and diameter are specified, which is why medals from different Games feel broadly similar in the hand despite looking different.
Hosts control the reverse face and the ribbon, and that is where local materials, motifs and craft traditions appear.
The obverse carries a fixed image
One face has followed a prescribed design for a long period, keeping a common element across editions so that a medal is recognizable regardless of host.
Changes to it are rare and heavily debated, since the image is one of the few things linking every edition visually.
The tension between a fixed face and a host-designed one mirrors the whole event, which is standardized in its rules and local in its presentation.
Hosts use materials to make a point
Recent hosts have incorporated recycled metals, local stone and regional craft techniques, turning the medal into a statement about the country's priorities.
Because athletes photograph the object constantly, those choices get more visibility than almost any other design decision an organizing committee makes.
It is also one of the few decisions with no competitive consequence, so committees can be adventurous without risking anything.
The bite is a photographer's convention
Athletes biting medals began as a joke about testing precious metal and became a pose because photographers started requesting it.
It spread across sports and countries within a short period, which is how a photographic convention becomes an apparent tradition.
Officials have discouraged it on grounds of dental damage and dignity, without noticeable effect, since the request comes from the people holding the cameras.

