See forest glass.
A type of very heavy glass tumbler (literally, wart beaker), made of Waldglass and decorated with prunts, dating from the sixteenth and seventeenth centuries. They frequently bear an inscription in German on the top third of the glass.
The process of decorating glass by means of a rotating wheel which grinds a pattern or inscription into the glass surface.
A late eighteenth-century style of glass consisting of bottles and flasks.
Decorated with swirling vertical ribbing to give a spiral effect.
The deterioration of glass (caused by exposure to adverse conditions0 that may show in the form of iridescence of frosting.