hexagonal

All of the medals from the Paris Games also feature an 18-gram, hexagonal piece of wrought iron from the Eiffel Tower.

"I wanted to find a particular roofing slate type, which tends to be hexagonal, with a long point on," he said.

The Olympic and Paralympic medals in Paris are being embedded with pieces from a hexagonal chunk of iron taken from the tower.

These values surpass those of commonly used materials such as silicon dioxide and hexagonal boron nitride.

The Olympic and Paralympic medals in Paris are being embedded with pieces from a hexagonal chunk of iron taken from the monument.