The Taiwanese jewelry artist Cindy Chao has partnered with the actor Sarah Jessica Parker to create an exclusive brooch for auction at Sotheby’s Magnificent Jewels and Jadeite Sale on October 7 in Hong Kong. This artistic collaboration, Chao’s first with an individual, comes as this year’s entry in her annual Black Label Masterpiece Butterfly series, which signifies her personal metamorphosis as an artist. Called the Ballerina Butterfly, it has a trim body and carefully turned legs that call to mind the gracef…