Sphalerite

$ZnS$

  Family sulphides
  Crystal system cubic
  Color brown, black, yellow, green,metallic gray , colorless
  Streak color brownish to light yellow
  Cleavage 1 perfect cleavage
  Hardness 3,5 to 4,0
  Density 3,9 to 4,1

Explanations: → Here List of minerals: → Here