Gold:  Physical Properties

Au

Crystal System:  Isometric (Cubic)
Luster:  Metallic
Color:  Rich Gold-yellow
Hardness:  2.5 - 3
Specific Gravity:  19.3
Streak:  Rich Gold-yellow
Fracture:  Hackly
Cleavage:  None
Other Physical Properties:  High electrical conductivity; High thermal (heat) conductivity; malleable; ductile.