gem mineralogy

例句：

1. 1. Gem mineralogy is the study of the properties and uses of gemstones.
   宝石矿物学是研究宝石的特性和用途的学科。
2. 2.The mineralogist analyzes the composition of minerals to determine their value.
   矿物学家分析矿物的成分以确定其价值。
3. 3.In gem mineralogy, the color and clarity of a gemstone are important factors in determining its quality.
   在宝石矿物学中，宝石的颜色和透明度是决定其品质的重要因素。