κοράλλιον

Korállion appeared in Greek by the third century BCE. Its deeper origin is uncertain — some scholars propose a Semitic source, others a pre-Greek Mediterranean word. What the Greeks knew was that coral was hard, red, and came from the sea. Ovid told the myth: Perseus, after killing Medusa, laid her head on seaweed. The seaweed turned to stone. This was coral — the sea made rigid by contact with something terrifying. The myth was an explanation for a real phenomenon no one yet understood.

Coral was a trade good in the ancient Mediterranean. Red coral from the waters off Sardinia, Corsica, and the North African coast was carved into amulets, ground into medicine, and strung into jewelry. Pliny the Elder wrote that Indian merchants valued Mediterranean coral as highly as Romans valued Indian pearls. The trade flowed both ways: Roman coral east, Indian gems west. The word korállion traveled with the product.

Medieval Europeans believed coral protected children from harm. Coral teething rings were standard baby gifts among the wealthy. The material was simultaneously jewelry, medicine, and talisman. Coral branches were carved by Italian craftsmen in Torre del Greco, near Naples — a town that has been the center of coral carving since at least the 1500s and still operates today.

Modern marine biology has revealed what coral actually is: not a plant, not a stone, but a colony of tiny animals — polyps — that secrete calcium carbonate skeletons. The precious red coral of the Mediterranean is Corallium rubrum. Climate change and ocean acidification are now dissolving the skeletons that ancient traders carved into amulets. The word is Greek. The organism is animal. The threat is chemical.