Gold is a precious metal yellow in color, and have known Gold since ancient times and was owning gold sign of affluence, has been known ancient Egyptians How are ways gold thin sheets, and during the Middle Ages grew fully aware of standing is called alchemy result attempts to make gold in ways artificial, at the present time some scientists succeeded to achieve the dreams of chemists veterans where it is now possible to extract gold from sea water.
There gold more than color, there Yellow Gold: It is pure gold, and produces shots of gold yellow and so by mixing gold with ratios of copper, silver and zinc in some cases, but must be controlled in these ratios tend color of pale whenever been reduced caliber.
* White Gold: Gold is mixed Balbladiom in order to acquire the color white and this was a substitute for platinum metal during the twenties of the last century and are white gold coating Balradeon and to restore the luster and sparkle and in the case of jewelry sets.
And can determine the caliber of gold through a knowledge of the hallmarks which sealed and to show clarity and carat gold and shows as well as the place where the analysis.
- There are certain countries are the main countries for the production of gold and these countries are South Africa and the United States, Canada, Australia and China.
Everything in the world has a history including metals and therefore Gold has a history and should shed light on the history of this metal as a result of the importance of this metal.
Gold
There is a belief that the metal gold metal exists since ancient times, and use the pre-history.
* In Peru, they manufacture pots by gold and gold also mixed and since 1200 BC., And scientists also discovered artifacts and great gold jewelry dating back to the era of the Sumerians in 3000 BC..
* 4000 BC. M: The first time I used gold in parts of Central and Eastern Europe.
* 3000 BC.: Egyptians are known in the art methods of gold and gold sheet metal, mixing gold with other metals to get different degrees of hardness and multiple colors. They also found a way casting gold, also known Sumerian civilization in Iraq using gold in the jewelery industry.
* 2500 BC. : Gold was buried in the tomb of Cheops first kings of the Pharaohs.
* 1352 BC.: The young king was buried Tutankhamun's tomb gilt, inside the gorgeous golden mask.
* 1350 BC. Babylon began to test the purity of gold by fire.
* 560 BC. : Making the first gold coin in Lydia in Asia Minor.
* 1100: famous Venice as the city of Bursa for its global gold in the middle of the trade routes to the east.
* 1900: America adopted the gold standard for its currency.
* 1922: When you open the tomb of King Tutankhamun was discovered shroud 2.444 a pound weight of gold, with hundreds of pieces of gold and gilded pots including mask referred to previously.
* 1927: proven medical study in France that gold is effective in the treatment of inflammatory rheumatic bones.
* 2000: Use astronomers in Hawaii Observatory giant mirrors giant gold-plated Observatory ever التلسكوبين, and in order to monitor more accurate images of the planet Neptune and Uranus.
* 1100: famous Venice as the city of Bursa for its global gold in the middle of the trade routes to the east.
* 1900: America adopted the gold standard for its currency.
* 1922: When you open the tomb of King Tutankhamun was discovered shroud 2.444 a pound weight of gold, with hundreds of pieces of gold and gilded pots including mask referred to previously.
* 1927: proven medical study in France that gold is effective in the treatment of inflammatory rheumatic bones.
* 2000: Use astronomers in Hawaii Observatory giant mirrors giant gold-plated Observatory ever التلسكوبين, and in order to monitor more accurate images of the planet Neptune and Uranus.
The gold metal is not affected to a large extent with water and air and oxygen, as it fits all climates natural, industrial and also does not react gold with oxygen, which is one of the most active elements and due to the lack interaction gold with oxygen, gold stainless Proof of this mask of Tutankhamun when extracted 1922 was a brilliant shining almost as it was since 1352 BC.
Gold is one of the most reflective metal heat as pure gold reflects more than 99% of the
incident radiation.
* Potassium Saened gold and gold reels are used in jewelry and lipstick cans and lighters, and the liquid gold used in decorating ceramics and glass.
The gold is also used in the field of medicine where the gold solution used in the treatment of rheumatoid arthritis and bone infections, as well as in dentistry since 3000.
* And gold is used in electronics and through links gold-plated in the computer, and telecommunications equipment, and household appliances, such as televisions, washing machines, and films of high or thick circuits Minor, which requires the development of toothpaste went like ink on ceramic base
The South Africa and the United States, Canada, Australia, China and the Philippines are the main producing countries in the world and went different ways to get the gold depending on the type of sediment are obtained two gold in two steps that are essential:
1 - get a raw
2 - separation of raw gold
Gold is used in the electrical, electronic and particularly in printed circuit conductors and in particular in the sub-links made of silicon coated and Blamkan used to cover the windows, helping to alleviate and reduce infrared At the same time let enough light The wire gold bullion are used in measurement equipment and measurements heat.
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