Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Birka and Hovgården' has mentioned 'Amber' in the following places:
Occurrence Sentence Text Source
Also walrus teeth, amber, and honey were exchanged.
In the late 19th century, Hjalmar Stolpe, an entomologist by education, arrived on Bjxc3xb6rkxc3xb6 to study fossilized insects found in amber on the island.
Stolpe found very large amounts of amber on the island, which is unusual since amber is not normally found in lake Mxc3xa4laren.