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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
tephrite iku sawijining aphanitic kanggo porphyritic tekstur, vulkanik rock igneous
saka tephra greek, awu saka basa indo-european, kanggo ngobong
rock grained coarse, rock grained nggoleki, medium rock grained, rock opaque