volcanic glass Definition

obsidian, basanite, xenocryst, poikilitic, ditroite, volcanic rock, stinkstone, felstone, feldspathoid, septarium, miascite, metamorphic rock, cacholong, anthraconite, gneissoid, novaculite, trichite, lapidarious, ureilite, igneous rock, omphacite, melaphyre, transparent gem, psammite, chert, phaneritic, tachylyte, lithophyse, fahlband, igneous, nephelinite, enhydros, swinestone, lapidific, tholeiite, holosiderite, sandstone, fiorite, euphotide, opaque gem, lapideous, tephrite, water sapphire, quartzite, calcedon, smaragdite, geyserite, vesbium, belonite, hornstone, garnierite, spongiolite, stilpnomelane, saussurite, chalcedony, cascalho, viridite, cairngormstone, martite, aphanite, rose quartz, thinolite, verd antique, lava, sagenitic, angrite, peperino, calcite, meteorolite, babingtonite, eurite, chloropal, sodalite, basalt, quartz, quartzoid, sycite, boulangerite, limestone, sedimentary rock, pillow lava, tilestone, quartziferous, andesite, lepidomelane, zirconoid, rhyolite, arenite, liparite, sagenite, blue john, luxullianite, astroite, mesosiderite, feldspar, bradyseism, kerolite, petunse, conite, radiolite,