Physical Properties of Iron and Gold
Melting Point
1,535.00 °C
  
25
1,064.43 °C
  
99+
Boiling Point
2,750.00 °C
  
37
2,807.00 °C
  
36
Appearance
  
  
Physical State
Solid
  
Solid
  
Color
Gray
  
Gold
  
Luster
Metallic
  
Metallic
  
Hardness
  
  
Brinell Hardness
194.00 MPa
  
99+
Speed of Sound
5,120.00 m/s
  
8
2,030.00 m/s
  
99+
Optical Properties
  
  
Allotropes
Yes
  
No
  
α Allotropes
Ferrite (alpha Iron)
  
Not Available
  
β Allotropes
beta Iron
  
Not Available
  
γ Allotropes
gamma Iron
  
Not Available