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.
[1] 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.
[2] In addition to the Sambia region, amber is gathered in noticeable amounts at German, Polish and Lithuanian Baltic beaches[2] (areas of the Bay of Gdańsk as well as the Vistula Lagoon), the western coast of Denmark[2] and the Frisian Islands.
[2] However, about 90%[3][4] to 98%[2] of all output of amber has been produced in the Sambia region (now a Russian exclave, formerly in Eastern Prussia and the Polish–Lithuanian Commonwealth).
[6][7] Another coastal strip referred to as “amber coast” is the Costa de Ambar (also known as “Costambar”) in the west of Puerto Plata (Hispaniola, Dominican Republic).