April 24 (SeeNews) - A stake of 15.8% in Bosnian iron ore mining company RZR Ljubija [BANJ:LJUB-R-A] will be offered for sale at a starting price of 11.998 million marka ($6.7 million/6.1 million euro) at a public auction on the Banja Luka Stock Exchange (BLSE), the bourse said.