Christie’s has scheduled its autumn jewellery sale for 29 November at the Hong Kong Convention and Exhibition Centre. The sale will comprise over 300 gems along with well jadeite jewellery, with a combined value in excess of US$55m. Leading the sale is the Perfect Pink, a 14.23 carat fancy intense pink diamond with an estimated value of HK$110m–$150m (US$14m–$19m). Also…