刚玉的种类包括（红宝石、星光红宝石、蓝宝石、艳色蓝宝石、星光蓝宝石）。白光中除去蓝光就呈黄色或红色。
The variety of boule includes ruby , starlight ruby , sapphire , beautiful sapphire and starlight sapphire . White light minus blue light is yellow or red in hue .
星光蓝宝石