1 Definition
1.1 definisi
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
carbonatite iku intrusive utawa extrusive rock igneous kang ditetepake dening komposisi mineralogic, dumadi saka mineral karbonat luwih saka 50 persen
1.1 Sajarah
1.2.1 asal
1.3.2 panemu
1.4 Etimologi
saka obsidianus latin, misprint saka obsianus (lapis) (watu) saka obsius
saka rock igneous intrusive, gadhah mayoritas mineral karbonat
1.5 kelas
1.6.1 sub-kelas
awet rock, medium atose rock
awet rock, rock alus
1.8 kulawarga
1.8.1 group
1.9 kategori liyane
rock opaque
rock grained coarse, rock grained nggoleki, medium rock grained, rock opaque