Most antique glass is made from lead glass. Leadlight refers to old decorative glass work, diamond window panes, and stained glass. Lead glass was also used to create crystal decanters and wine glasses. Lead is toxic, so most modern glass does not use lead. Most modern glass is soda-lime glass. This is non-toxic and less expensive to create. Also, antique glass shatters into sharp shards when broken and most modern homes use tempered glass for safety reasons.