外觀白色,白度90,折射率1.67,比重2.79,鬆散堆積密度0.28,200目篩網通透率100%
坯體(ti) 用矽灰石,鈣32-35%, 燒失4-10%,濕白25-70
鈣>32%,燒失量4-10%,燒後白度20-70
矽99.33%,鐵0.038%,鋁0.28%
矽45-51%,鈣41-46%