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CHEMICAL AND MINEROLOGICAL CHARACTERIZATIONS OF THE OLTU STONE (TURKISH BLACK AMBER), ERZURUM, TURKEY
(STEF92 TECHNOLOGY, 2013)
Oltu stone carving is being done in an extensive scale in Oltu and Erzurum and a bit in Ardahan which are located in the eastern part of Pontide belt in Turkey. The Permo-Carboniferous, Jurassic-Cretaceous, Tertiary and ...