During the 20th century, costume jewellery became popular amongst sartorial enthusiasts, replacing pieces crafted from expensive materials such as precious metals, gems and stones. The Art Deco period of the 1920s and 1930s saw fashion icon, Coco Chanel, introduce bangles, cocktail rings and other types of costume jewellery. Developments in plastic after the Second World War instigated a period of brightly-coloured, chunky pieces, contrasting the delicate jewellery of eras passed. These pieces made from cheaper, man-made materials were more accessible, affordable and exciting amongst youth culture, introducing new designs that had not been created before. Fine jewellers and designers came to embrace this new movement, recreating these designs with luxurious touches; some of the most notable fashion houses to produce costume jewellery include Dior and Chanel.