What amber is
Amber is fossilised tree resin, formed over many millions of years. It is light, warm to the touch, easily carved and polished, and ranges from pale yellow to deep red-brown. It sometimes contains trapped insects or plant fragments. Several parts of the world produce amber, but the best-known source for ancient Europe was the Baltic region, where large amounts wash up on beaches and can be dug from the ground. Baltic amber contains succinic acid, which allows laboratories to distinguish it from other kinds, and this has helped researchers trace where certain finds came from.
The Greek word for amber, elektron, is the origin of the modern word electricity, because amber rubbed with cloth attracts light objects. Writers such as Thales, according to later authors, remarked on this property. Amber was therefore both a beautiful material and a curious one.
Early exchange in prehistory
Amber was being worked in northern Europe in the Stone Age, long before the Mediterranean was involved. Beads and small carvings are known from Baltic and Scandinavian sites. In the Bronze Age, it began moving south in noticeable quantities, passing through communities in central Europe by exchange from hand to hand. This was not a single trading expedition but a chain of local transactions.
Beads thought to be Baltic amber appear in rich graves in Bronze Age Greece, including the shaft graves at Mycenae, in the sixteenth century BCE. This indicates that elites in the Mycenaean palaces prized the material and had access to it through long exchange networks, although the individual merchants are unknown. Amber was also found in Bronze Age Britain, and in other parts of Europe, and its presence in the graves of people of high status suggests it signalled rank.
Routes through the continent
Amber seems to have travelled along river valleys and passes. A common reconstruction runs from the southern Baltic coast and the Vistula region to the Danube or to the head of the Adriatic. From there it could go by sea to Greece or into Italy. The Po valley and the Adriatic coast were important links, and Etruscan and Greek merchants active in northern Italy would have handled much of the traffic. Other routes went along the Rhône and the Atlantic coast.
Scholars often use the label “Amber Road” for these paths, but it is a modern shorthand. The routes shifted over time, and archaeologists reconstruct them from finds and from analysis of the material rather than from any ancient map. The tin and metal routes that crossed Europe in the same period are discussed in Bronze Making and the Tin Problem, and, in the north, salt was exchanged at places such as Hallstatt salt mining sites, another sign of long-range contact in central Europe.
Greek and Roman knowledge
Greek writers were curious about the source of amber and sometimes told fanciful stories about it, such as that it came from the tears of grieving sisters of Phaethon in the myth, turned into trees by the river Eridanos. These stories show that the origin was uncertain. The explorer Pytheas of Massalia, in the fourth century BCE, is reported by later authors to have heard about amber from northern peoples, which is part of the story of the Pytheas voyage.
Under Rome the trade became better organised, and Roman writers knew that the amber came from the northern shore. Pliny the Elder, writing in the first century CE, says that a Roman knight was sent in the time of Nero to collect amber from the Baltic and returned with a very large quantity, which was used to decorate gladiatorial shows. The report cannot be checked, but it fits a time when amber was fashionable and when roads and rivers allowed trade to extend north. Tacitus, in his Germania, wrote that the Aestii, a people on the Baltic coast, gathered amber and sold it without knowing its use, a claim that probably reflects a Roman view of the northern peoples. The Roman road travel network helped carry such goods across the empire.
Northern Italy, especially Aquileia at the head of the Adriatic, is often described as a major workshop centre for amber objects in the early empire, with carvers making beads, figurines and small vessels.
Why amber was prized
Amber was valued first for beauty. It also had a reputation for protective and healing powers, and it was worn as amulets and sometimes used in medicine, a belief preserved by Pliny, who discussed its supposed uses. How far ordinary people shared these beliefs is difficult to say.
It was also a convenient luxury. A small bag of amber was light but high in value, and so was worth carrying over long distances. Its price depended on size and colour; large, clear pieces were particularly esteemed. Pliny said that a small amber figure could cost more than a living slave, a comparison that should be treated as an anecdote and not a firm price.
What the evidence can and cannot show
Because amber is organic, it does not always survive well, and many finds come from graves, hoards and sites with good preservation. Chemical studies sometimes show that apparent Baltic amber came from other regions, or the reverse, so the picture continues to be refined. The surviving evidence demonstrates that over many centuries a northern material moved across Europe to Mediterranean hands, though the people who took part in each leg of the journey mostly remain anonymous.