A glassy pink, green, violet, or blue aluminum borosilicate mineral, Al8BSi3O19OH, used in spark - plug ceramics and as imitation lapis lazuli.

• 蓝线石一种玻璃状的粉，绿，紫或蓝色硼硅铝酸盐矿物，组成为Al8BSi3O19OH，用于火花塞制陶及用作仿天青石