A new kind of glass-ceramic phosphor, which contains crystalline phases with green emissions, is explored. The glassceramic is prepared through semi-melt-quenching procedure with a nominal composition of (Ca_0.99Eu_0.01)₃Si₂O₇. The greenemitting crystals are precipitated and identified to be β-Ca₂SiO₄: Eu²⁺ which is responsible for 510 nm-peaked much broader band emissions holding at 1550 °C for half an hour. In terms of the available light scattering theory, the appearance of opaque is discussed by closely associating with size and morphology of luminous β-Ca₂SiO₄ crystalline phase in glass.