What is the fine-grained topic of the following text: Free and iconoclastic, Gabrielle Chanel was the first to give the jewel called “fantasy” its letters of nobility, with rows of false and sumptuous pearls, the interpretation always renewed from the camellia, the stacking of rich and long necklaces, bracelets with charms and luxury pieces... Coco Chanel launched her jewellery workshop in 1924 and signed her first jewellery collection in 1932, not hesitating to invest all jewels with the same audacity, blowing a new wind into the world of jewellery. Only return the topic.
Coco Chanel's impact on the world of costume jewelry.