This non-working perfume atomizer is made of pink cased crystal cut in a crisscross and octagon pattern. The top and spray nozzle are chrome-plated brass. Due to age and normal use, the rubber bulb has become cracked and hard. 4Dia. x 5.5T. From France.Historical BackgroundCased glass is a glass piece that has two or more layers of different colors. The inner or outer layers of this glass can also be clear. It can be created in a number of ways. One method involves blowing a new color inside of a piece that has already been created. Another process entails layering different colored glasses over each other. In each technique, the multiple layers of glass are fused and blown out together to form the cased glass. One of the earliest examples of cased glass is the Portland Vase, which dates to the end of the first century B.C. or the beginning of the first century. A renewed interest in and use of cased glass began in Bohemia in 1804 and continued in France in 1825. Shortly thereafter, Britain's glassblowers followed suit and began casing glass in 1844.