Gold

Lustre: Metallic.
Hardness: Mohs 2.5–3 — soft; a knife will scratch it.
Streak: Golden yellow.
Habit: Cubic crystal system.

Colour	Gold, Yellow
Mohs hardness	2.5–3
Lustre	Metallic
Streak	Golden yellow
Crystal system	Cubic
Transparency	Opaque
Cleavage	None
Fracture	Hackly
Chemical formula	Au
Specific gravity	19.3

What is Gold?

Gold is a chemical element; its chemical symbol is Au and atomic number 79. In its pure form, it is a bright-metallic-yellow, dense, soft, malleable, and ductile metal. Chemically, gold is a transition metal, a group 11 element, and one of the noble metals. It is one of the least reactive chemical elements, being the second lowest in the reactivity series, with only platinum ranked as less reactive. Gold is solid under standard conditions.