Gold
Gold in its pure state: (refined after mining)
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Does not corrode, tarnish or rust. Gold coins and jewelry found in sunken
ships are as bright and shiny as the day they were made. Gold can last forever.
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Can be flattened and stretched more easily than any other metal. One ounce
of gold can be stretched into a wire 50 miles long. Entire palaces can be
covered with gold leaf using just a small amount of gold.
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Has a deep yellow color and a high luster. This yellow color led ancient
civilizations to link gold to the sun, the giver of life.
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Is softer than most metals. It has a hardness of 2 to 2.5 on the Mohs' scale
of hardness. Gold can be easily scratched and scraped. Gold becomes harder
when alloyed with other metals.
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Is heavy compared to most other metals. Pure gold is almost twice as heavy
as silver and lead. Alloying it with other metals decreases its weight.
Gold when mixed with alloys to be manufactured into jewelry
When buying gold jewelry always look for a karat mark, such as 18K , 14K
, 10K .
24K is 100% pure gold, or 24 parts gold, which is generally considered too
soft for practical use in jewelry. 18K is 18 parts (75.06%) gold and
6 parts (24.94%) alloys; 14K is 14 parts gold and 10 parts metal; and 10K
is 10 parts gold and 14 parts metal. Gold in its pure state is yellow. However
it is possible to buy it in a variety of colors, such as white, pink, green
and other colors. These colors are produced by mixing alloys with the gold
in prescribed. Alloys consit of metals like silver bronzes nickle and other
metals.
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