It is the only metal that will not rust or tarnish.
In its pure form, gold has a sun-yellow metallic luster. But when it is in the presence of other metals, it has various colors ranging from silver-white to green and orange-red.
It is also present in sea water, at the ratio of 5-25 parts to 100 million parts of water.
Gold has high electrical conductivity---excellent when used as electronic components.
|Gold is Excellent as an Electronic Component|
Only approximately 175,000 tons have been mined in all of history, 75% of which has been mined since 1910. This amount of gold is so small that if it were formed into a cube, it would be slightly smaller than a tennis court cubed.
Gold is so rare that the world pours more steel in one hour than it has poured gold in all of recorded history.
One cubic foot of gold weighs half a ton.
|Olympic Gold Medal|
There are more than 400 references to gold in the bible.
The first known gold coin was made by the Lydians in 560 BC.
Gold and copper are the only two non-white-colored metals. Both were discovered around 5,000 BC.
|Part of the Vault at Fort Knox, Kentucky|
|Klondike Gold Rush, 1896|