Di Jingru, female, associate professor. 1986, graduated from Rocks and Minerology of former Wuhan Geological College. 1986-6/1989, teaching in Community College of Geological Sciences in Qinghai; 1989-2002, teaching gem and jade carving in Nanyang Technology University; 1993 to now, teaching in Gem Institute of China University of Geosciences (Wuhan). Di has acquired certificates like GIC、DGA、CGC successively. Now, Di, a lecturer of Gem Institute of China University of Geosciences (Wuhan), and appraiser of both Jewelry quality supervision and testing station in Hubei and Jewelry testing center in China University of Geosciences, mainly engaged in experimental teaching of gemology, precious metal testing, gem resources and mineral deposits.