What Does the Karat in Gold Mean?
The purity of gold is determined by the measure of gold and alloy
combinations, the alloy being other metals such as silver, copper,
tin, etc. The purity is defined in "karats". One karat
is a total figure of 24, which is the combined proportion of gold
that exists in the alloy, when added to the other metals.
One part gold, with 23 parts of alloy, is considered to be 4% pure
gold, or one karat. That is a very low percentage, and an item made
from that mix might not have the rich, metallic appearance you expect.
Ten parts of gold, and 14 parts of alloy will give you 42% pure
gold, or 10k, which is generally the lowest ratio that you will
see in jewelry. The other karat measurements in gold are 14 parts
gold and 10 parts alloy for 58% or 14k, 18 parts gold and 6 parts
alloy for 75% or 18k, 22 parts gold and 2 parts alloy for 91% or
22k, and the very purest gold, is 24 parts all gold.
Gold, depending on the alloys that it is blended with, is generally
considered a very "soft", or malleable metal. Methods
of purifying and removing other materials and metals have changed
greatly over the years, but nowhere in history, is there a finer
or more famous piece of gold work than the funerary equipment of
King Tut, unearthed in 1923, after more than three thousand years.
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