Specification: Olivine Designation Specification Olivine sand Calcined olvine Chemical Compositions％ ＭＧＯ 40-45 46-50 SiO 2 33-37 38-42 CaO ＜2 ＜2 Al 2 O 3 ＜2 ＜2 Fe 2 O 3 6-9 6-9 Physical Data LOI％ 9-11 ＜1 Bulk Density g/cm 3 2.8 2.5 M-hardness 5.5 4.5