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
amphibolite bisa ditegesake minangka rock metamorphic granular kang utamané kalebu hornblende lan plagioclase
1.2 Sajarah
1.2.1 asal
1.2.2 panemu
obsius
Alexandre brongniart
1.3 Etimologi
saka obsidianus latin, misprint saka obsianus (lapis) (watu) saka obsius
saka amphibole + -ite
1.4 kelas
batuan beku
rocks metamorphic
1.4.1 sub-kelas
awet rock, medium atose rock
awet rock, hard rock
1.5 kulawarga
1.5.1 group
1.6 kategori liyane
rock opaque
rock grained coarse, medium rock grained, rock opaque