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
basalt punika rock igneous extrusive umum kawangun dening cooling kanthi cepet saka lahar basaltic kapapar ing utawa banget cedhak ing lumahing bumi
1.4 Sajarah
1.4.1 asal
1.4.2 panemu
1.5 Etimologi
saka obsidianus latin, misprint saka obsianus (lapis) (watu) saka obsius
saka pungkasan basaltes latin (varian saka basanites), watu banget hard, kang diimpor saka basanites greek kuna
1.6 kelas
1.6.1 sub-kelas
awet rock, medium atose rock
awet rock, medium atose rock
1.7 kulawarga
1.7.1 group
1.8 kategori liyane
rock opaque
rock grained nggoleki, rock opaque