FeCO3Trigonal
Siderite
FeCO3
CarbonatesChemical FormulaFeCO3
Crystal SystemTrigonal
Mohs Hardness4.5
Specific Gravity3.96
ColorYellowish brown, grayish brown
LusterVitreous to pearly
StreakWhite to yellowish
CleavageThree directions
FractureConchoidal to uneven
Occurrence
Found in sedimentary and hydrothermal deposits. Minor iron ore.