618狂欢节 5月31日20点-6月20日 NEWLY REVISED FIFTH EDITION GEMSTONES OF THE WORLD Precious and Semiprecious Stones 1,900 Photos of Gems in Rough and Polished States Complete Physical Properties and Characteristics Finding,Mining,and Cutting 官方立减 20000+现货直降再享9.4折起 15% 到手优惠=官方立减15%+店铺折扣+优惠券