Keywords: Tetraedrit 1.jpg Mineral tetrahedrite chemical composition CuFe <sub>12</sub>Sb<sub>4</sub>S<sub>13</sub> from collection of National Museum Prague Czech Republic Minerál tetraedrit ze sbírek Národního muzea v Praze původem z Čech own Karelj 2008-04-20 Tetrahedrite Geological and mineralogical Exhibition NM Prague |