Amber was called  &quot;the gold of the north&quot;(1), there was even established a trade route (similar as famous Silk Route) from the North and Baltic seas to  Mediterranean Sea.<p>1. <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Amber_Road" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Amber_Road</a>