Gold is valued not only for its beauty, but also
for its high resistance to corrosion, its malleability and its
longevity. Gold will not readily combine with other metals. It is one
of the greatest conductors of electricity.
A cubic foot of solid gold weighs about 1,200 pounds. The standard
gold brick, or bullion bar, contains 1,000 troy ounces.
MORE: CoinWorld.com's precious metals basics
The purity of gold is measured in fineness, parts of gold per 1,000.
Pure gold is called 24 karat. A small quantity of silver will reduce
the yellowish color of gold, and with added quantities it will develop
a greenish color. Copper added will deepen the gold color. A pure
white alloy is obtained by adding platinum, nickel or zinc; this is
called white gold or jeweler’s gold, and can also be produced by
alloying yellow gold with palladium.
The above is an excerpt from the eighth edition of the
Coin World Almanac
, published by Amos Media Company in 2011.