The Amber Coast is the name given to a coastal strip of the Baltic Sea in the northwest of Kaliningrad (Russia, Kaliningrad Oblast, Sambia Peninsula, formerly northern East Prussia in Germany). In this area amber (Baltic amber) has been excavated since the mid-19th century and up to today in open-pit mining. Two deposits – Palmnikenskoe and Primorskoe, containing 80% of world amber reserves, were found near Yantarny on the Western coast of the Sambia Peninsula in 1948-1951’s.
Scientists believe that amber was deposited during the Upper Eocene and Lower Oligocene in a delta of a prehistoric river, in a shallow part of a marine basin. In addition to the coast near Kaliningrad, amber is also found elsewhere in the Baltic Sea region. The deposits are found mostly in the "blue earth glauconite", a layer 1 to 17.5 meters thick found 25 to 40 meters from the surface. In addition to the Sambia region, amber is gathered in noticeable amounts at German, Polish and Lithuanian Baltic beaches (areas of the Bay of Gdańsk as well as the Vistula Lagoon), the western coast of Denmark and the Frisian Islands. Small amounts of Baltic amber can even be found outside the Baltic region, for example on the coastline of the south east of England.