Obsidian lan Soapstone Definition
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
iku Magnesium sugih rock metamorphic amarga dumadi saka talc Mineral
Etimologi
saka obsidianus latin, misprint saka obsianus (lapis) (watu) saka obsius
saka abad ka-17, amarga saka aran greasy lan nggunakake kaya sinetron sing
kelas
batuan beku
rocks metamorphic
sub-kelas
awet rock, medium atose rock
awet rock, rock alus
group
vulkanik
ora ditrapake
kategori liyane
rock opaque
rock grained nggoleki, rock opaque