Gold is the most malleable and ductile metal.
A single gram can be beaten into a sheet of one square meter, or an ounce into 300 square feet.
Gold leaf can be beaten thin enough to become translucent.
The transmitted light appears greenish blue, because gold strongly reflects yellow and red.
Gold readily creates alloys with many other metals.
These alloys can be produced to increase the hardness or to create exotic colors.
Gold is a good conductor of heat and electricity, and is not affected by air and most reagents.
Gold is very dense, a cubic meter weighing 19300 kg and is the second densest element.

Source: www.wikipedia.org