natural glass Definition

quartz glass, silica glass, wire glass, glass, transparent substance, vitrescent, schmelze, harmotome, vitrifacture, vitrite, hematinon, flint glass, sandiver, hypocrystalline, xenocryst, crystal, babingtonite, pollucite, bead proof, lanarkite, knebelite, unvitrified, opal glass, tyrolite, devitrify, cacholong, chloropal, ripidolite, tysonite, zirconoid, cyclosilicate, smaltite, bombolo, semivitrified, tektite, warwickite, cover slip, baddeleyite, holocrystalline, orthite, datolite, petunse, boulangerite, luxullianite, polianite, euclase, phillipsite, sagenitic, pearlash, feldspathoid, vitrifiable, crystallogenesis, fahlband, pectolite, hauerite, liroconite, ureilite, quartzoid, libethenite, pigeonite, jamesonite, okenite, poikilitic, water sapphire, allophane, hold water, saussurite, argyrodite, ferrocalcite, omphacite, holosiderite, blue john, albolith, cancrinite, ice needle, potichomania, aluminium oxide, hyalophane, silica, mesosiderite, schreibersite, belonite, polverine, martite, crystal system, paraselene, ditroite, cerite, stilpnomelane, rose quartz, opaque gem, enhydros, colcothar, white sapphire, bisilicate, gummite, perthite, anglesite, pucherite, iceland spar,