Obsidian lan Obsidian Definition

obsidian punika kaca vulkanik alami kawangun minangka rock igneous extrusive. diprodhuksi nalika lahar felsic extruded saka gunung mbledhos ndingin kanthi cepet karo wutah kristal minimal   

  

Ethiopia   

obsius   

saka obsidianus latin, misprint saka obsianus (lapis) (watu) saka obsius   

batuan beku   

awet rock, medium atose rock   

  

vulkanik   

rock opaque