Index Name	Excellent quality index
Calcium Content	≥98
Precipitation Volume	≥2.8
Whiteness	≥93
Water	≤0.4
Alkalinity	≤0.1
Iron Content	≤0.006
Tailing 125 um	≤0.001
Tailing 45 um	≤0.05
Insoluble in HCL	≤0.15
Sedimentation	≤50