Not all Van Cleef & Arpels four-leaf clovers are lobster buttons. According to relevant data, the Van Cleef & Arpels four-leaf clover necklace was modified from the original lobster clasp in 20021year, and none of the necklaces produced afterwards were lobster clasps. Van Cleef &: Arpels is a famous luxury brand in France, and it has always been a top jewelry brand loved by nobles and celebrities all over the world.