Applied Gemmology应用宝石学
gemmology speciality宝石专业
Gemmology laboratory宝石研究所
HND Gemmology宝石学
Modern Gemmology宝石新知
Introduction to Gemmology宝石学导论
HND D Gemmology宝石学
gemmology gemological gemology宝石学
Gemmology and Jewellery Studies宝石和珠宝研究
N（名词） the branch of mineralogy that is concerned with gems and gemstones 宝石学