The majority of carnival glass pieces had designs on the outside of the glass, with some pieces having two different designs, one on the inside of the glass piece, and a different one on the outside.
Its current name was adopted by collectors (probably in the 1950s?
) from the fact that it was sometimes given away as prizes at carnivals or fairs.
Only pieces produced from 1910 on though bore the Northwood hallmark of an N enclosed in a circle.
The company also gave names to their different colors of iridescent glass: Golden Iris for the purple glass, Emerald for the green glass, and Azure for the blue glass.
This beautiful glassware with patterns ranging from flowers to animals and fruits has become highly collectible for those who appreciate the brilliant colors that form a rainbow of colors from the iridescent sheen on the glass.