... spinel, MgAl2O4 transparent spinel, MA polycrystalline spinel) is a Transparent Ceramic spinelIntrodctionTransparent ceramic spinel (Transparent Magnesium Aluminate spinel, MgAl2O4 transparent spinel, MA ... in China. It has the best ratio of performance to priceTransmittance of transparent ceramic spinelColor is red, green, blue, purple, brown, and black ...