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Step 1
Learn about depression glass. Read books and study website sources. Mauzy's "Comprehensive Handbook of Depression Glass Prices" lists each pattern along with the available colors, as well as which patterns are being reproduced and information on the reproductions.
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Step 2
Look at authentic depression glass. When you know what the real stuff looks like, it will be easier to spot a reproduction. Visit reputable dealers and antique shops. You can't spot reproductions in online photos.
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Step 3
Know which pieces each pattern originally came in. Reproductions may have changed the design slightly or include pieces were not originally made. For example, depression-era Madrid never had footed goblets or 11-ounce tumblers.
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Step 4
Familiarize yourself with the colors for each pattern. Reproductions may have slightly different colors or use colors that are not original to the pattern. For example, the Madrid pattern did not originally come in the color teal. If you see Madrid in teal, this means this is a reproduction piece.
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Step 5
Know the dimensions of each pattern. Reproductions may have slightly changed the size. For example, In the Cherry Blossom pattern, the circle or well in the bottom of the cereal bowl originally measured 2.5 inches in diameter. Reproduction cereal bowls have a 2-inch diameter well in the bottom.
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Step 6
Consider the weight of the glass. Reproductions may have thicker glass and be heavier than the original. For example, Miss America tumblers originals had a quarter-inch thick bottom, while the new tumblers have half-inch thick bottoms.
