宝石学 [宝] gemmary ; gemological ; HND D Gemmology
金石学 epigraphy ; epigraphy sphragistics ; tombstones study ; art of metal and stone inscription
美国宝石学院 GIA ; Gemological Institute of America
陨石学 meteoritics ; [地质] aerolitics ; [地质] astrolithology ; astrolithologie
美国宝石学会 Gemological Institute of America ; GIA ; American Gem Society
岩石学 [岩] petrology
国际宝石学院 IGI ; International Gemological Institute ; The International Gemmological Institute
欧洲宝石学院 EGL ; European Gemological Laboratory
沉积岩石学 [岩] sedimentary petrology ; [岩] sedimentary petrography ; Sedimentary Rocks
构造岩石学 [岩] structural petrology ; microtectonics ; petromorphology
建筑学中，拱道或门口的拱心石，是把建筑整体连接在一起来防止它倒塌的石头。
In architecture, a keystone in an archway or doorway is the stone that holds the whole thing together, and keeps it from collapsing.
里德先生在大学主修海洋地质学，但他却在一家制造大理石手工艺品的公司上班。
Mr. Reid majored in Marine geology at college, but he worked in a firm that manufactured marble handicrafts.
他的教授建议他先学琢石，因为做基石需要很多工作。
His professor advised him to learn stonemasonry first; there was plenty of work making headstones.
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