摘要: 宝石的颜色是其最重要的物理性质之一,也是宝石学界最关切的,提高宝石档次的关键问题之一,本文介绍了宝石致色的一些因素和作为宝石颜色改善的新方法—辐照改色的一些动态. The colour of gem is one of the most important physical properties of gem.Some factorson the colouring of gem and situations of colour improvement by irradiation are introduced in this pa-per.