The nearly 100-year-old pearl house Assael, known for its exquisite rare pearls, is turning its attention to wildlife preservation with the Endangered Species Collection by Julie Parker for Assael, a line of jewelry created in collaboration with the London designer Julie Parker. Each piece in the collection—featuring large-pendant necklaces as well as cuff links and a bracelet—depicts an animal known to be at risk of extinction, from a Siberian tiger to a polar bear. The 18-karat, white- or yellow-gold sculptu…