A material for the production of costume jewellery and jewellery stones with a high index of refraction and high heat resistance

摘要

Production and the bi utern í ch perkovych stones and high refractive index and high thermal resistance of glass material are described, this is to add rare earth oxide and oxidation niobi n é ho at least 1. by aluminium-silica glass65 and the refractive index of dispersion be higher than and 0012 contain: 0 to 30 weight %. The SiO2 of 10 to 50 weight %. Al2O3,20~70 weight %. La2o3+Y2O3,0.1 to 20 weight %. nb2o5.