definisi
asal
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Etimologi
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kategori liyane
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
saka obsidianus latin, misprint saka obsianus (lapis) (watu) saka obsius
awet rock, medium atose rock
gabbro iku sawijining igneous rock intrusive kang kimia padha karo kanggo basalt plutonic
christian Leopold von Buch
saka latin glaber gundhul, Gamelan, gundul
rock grained coarse, rock opaque