... 5. non-discolouring photovoltaic use Clear quartz glass rod at competitive price1, quartz glass rod2,tight siz tolearance3,Resistance 1100 degree ... Physical Properties (g/cc)Density20 °C kg.m-32.2Degree of Hardness Moh’s Scale5.5-5.6Softening point(degree)1683Annealing ... quartz tube, and so on. And we have further capacity of trim cutting, fire-polishing, pinching, and bending, and so on ...