Oltu taşı = Oltu-Stein denke ist eher Gagat als Shungit
The Turkish amber is known as “Oltustone”, “Erzurum Stone”, “Black Amber”, “Gagat”, “Jayet” and “Jet” in the literature (Ethem, 1990). It is called “Oltutaşi”, “Erzurum Taşı”, “Kara Kehribar”and "Sengi Musa” in the Turkish language.
Grüße Stefan