Oltu taşı

== Turkish == === Etymology === By surface analysis, Oltu (“a town in Erzurum province”) +‎ taş (“stone”). === Pronunciation === IPA(key): /oɫ.tu taˈʃɯ/ === Noun === Oltu taşı (definite accusative Oltu taşını, plural Oltu taşları) (mineralogy) jet, black amber, a hard, black form of coal, sometimes used in jewellery Synonyms: kara kehribar, oksidiyon taşı ==== Declension ==== === Further reading === “Oltu taşı”, in Turkish dictionaries, Türk Dil Kurumu Ayverdi, İlhan (2010), “Oltu taşı”, in Misalli Büyük Türkçe Sözlük, a reviewed and expanded single-volume edition, Istanbul: Kubbealtı Neşriyatı Çağbayır, Yaşar (2007), “Oltu”, in Ötüken Türkçe Sözlük (in Turkish), volume 4, Istanbul: Ötüken Neşriyat, page 3611