Explanations:→ Here

Siderite

$FeCO_3$

  Family carbonates
  Crystal system hexagonal
  Color brown pâle to dark brown, grey
  Streak color white, sometimes tinged with yellow
  Cleavage 1 perfect cleavage
  Hardness 3,5 to 4
  Density 4,0

Explanations: → Here List of minerals: → Here