In 1931, tin cans and scrap paper were used to adorn the tree — appropriate decorations for Depression-era America. Then came garlands and glass. Colored lights and ornaments in the shape of dogs and sailboats made their appearance in 1934. A 4-ft. plastic star, a white spray-painted tree and 10-ft.-long aluminum icicles were staples of the 1950s. The 1990s took it up a notch with a gold-leaf star. But that was nothing compared to the 550-lb. Swarovski star unveiled in 2009. Created specifically for the tree and standing 10 ft. tall, the estimated $1.5 million star is made of 25,000 crystals and 1 million facets.