METALLIC LUSTRE
HARDNESS
 2.5 - 5.5
    2.5
  3.0
  4.0
  4.5
  5.0
Index
 
Hardness 2.5
Colour
Streak
Red to black Red
Lead-grey Brownish grey
Black Dark grey
Grey Grey
Silver white / cream Silver white
 
 
Hardness 3.0
 
Colour
Streak
Grey to black Grey to black
White - Grey Grey
Copper red Red - metallic
Brass yellow Green - grey
Silver - white 
(often tarnished black)		 Silver
Black Grey black
Yellow Yellow
 
 
 
 
 
 
 
 
Hardness 4.0
Colour
Streak
Brass yellow Greenish black
Brass yellow Brown
Black Brown
Bronze yellow Grey black
Grey Grey
Steel grey Steel grey
 
 
 
 
 
 
 
 
Hardness 4.5
Colour Streak
Black Brown black
 
 
 
 
 
 
 
 
 
 
Hardness 5.0 - 5.5
Colour
Streak
Brown, black Yellow - brown
Black Black
Grey to black Black
Copper - red Brown - black