History
Manufactured in the United States from the 1920s until after World War II, Depression glass was inexpensive and came in clear, colored and iridescent shades.
Distribution
Depression glass was offered as a premium, or as a gift, for buying another item. Housewives found these glass items in products such as detergent or oatmeal boxes; gas stations often gave a cup or plate for a fill-up; and movie theaters included a piece with movie tickets.
Features
Several distinctive colors define Depression-era glass, including amber, green, pink, cobalt blue and iridescent. A few of the patterns were Mayfair, Royal Lace and Iris, which are popular with collectors today.
Identification
The easiest way to be certain Depression glass is authentic is to match the color and pattern with one of the manufacturer's pieces. Also it is important to take note of the weight of the piece, because reproductions are often heavier, according to collector, author and authenticator Murray Hughes on the Depression Glass Secrets website.
Warning
Before investing a large sum of money in Depression-era glass, especially if the acquisition is for investment purposes, consult an expert in the field, or at least spend time in education and research, to be sure the pieces are genuine.