宝石学

例句：

1. 1. Gemology is the study of gemstones and their properties.
   宝石学是研究宝石及其特性的学科。
2. 2. She decided to take a course in gemology to learn more about gemstones.
   她决定参加一个宝石学的课，以便了解更多关于宝石的信息。
3. 3. The museum has a collection of rare gems that are on display for visitors to admire.
   博物馆有一套稀有宝石的收藏，供游客欣赏。