WApache tears
WAustralite
WDarwin glass
WFulgurite
WGeorgiaite
WImpactite
WLechatelierite
WLibyan desert glass
WLimu o Pele
WMaskelynite
WMoldavite
WObsidian
WPalagonite
WPele's hair
WPele's tears
WPhilippinite
WPitchstone
WScoria
WSea glass
WTektite
WTrinitite
WVolcanic glass