粉末状赤铁矿、褐铁矿、氧化锰多形成松散的土状集合体，致密块状的赤铁矿则分布于石英砂粒周围；
Powder hematite , limonite and manganese minerals usually formed more loose earthy aggregate while dense massive hematite is distributed in the surrounding of quartz .
土状集合体