The Waterford "waffle" pattern of Depression Era glass is easily recognizable by its crosshatch, waffle pattern. Originally, the Waterford pattern was only manufactured by the Hocking Glass Company from 1938 to 1944. The pattern was most commonly available in crystal (clear) and pink, but limited quantities of yellow and white were also produced. In 1950 the waffle pattern was reissued in green; but because the green is considered a replica, it's not as coveted by collectors. Once discarded as cheaply made pieces of glass, the Waterford pieces originally sold for as little as two to five cents each. Today a single pink or clear Waterford cup sells for about $15. A large pitcher, such as the one pictured, can be worth up to $200
Know your pattern. Waterford's nickname is the "waffle pattern," because it looks like a waffle. Each diamond in the middle of the crosshatch bevels outward, creating a pyramid effect. The bottom of the glass should be smooth.
Know your colors. If you find what looks like Waterford glass in cobalt blue, ruby red or amber, it's either a replica or it's just not Waterford. Remember, Waterford only comes in clear, pink, white and yellow, and after 1950 it was reissued in green. Most often you'll see the clear and pink. One of the biggest signs of a fake is the wrong color with the wrong pattern.
Beware of replica artists. Collecting Depression Era glass has become a popular hobby, and many companies are making realistic replicas. Depression glass is often identifiable by its imperfection, because it was cheaply made. Look for bubbles, lines or discoloration in the glass. With pieces that have lids, such as butter dishes, it is common for the lids not to fit securely or to sit unevenly. Depression Era glass is also thick and heavy. The waffle pattern is notoriously one of the heaviest. If you pick up a piece whose condition appears too good to be true, it is probably a replica.