During 4000 BC gold was first used in Eastern and Central Europe. 1500 BC, Nubia, the gold bearing nation made Egypt a wealthy nation and also in international trade gold has become a known standard of medium of exchange. In order to test the purity of gold Babylonians began to use fire essay on 1350 BC. Quadrangles or squares of gold are officially permitted in China as a form of money during 1091.
On 1284, The Great Britain gave its first gold coin, the Florin, and then it was followed by the Angel, the Noble, the Guinea and the Crown. Isaac Newton the Master of the London Mint sets the price of gold on 1717 that lasts for 200 years. The gold rush of California begins on 1848. On 1896, while fishing two prospectors discovered gold in the Klondike River in northern Canada.
During 1927, the Medical study in France has proved that gold has valuable things in treatment of Rheumatoid arthritis. Gold price was fixed at $35 per ounce by Roosevelt at 1934. The laser was discovered by using gold-coated mirrors during 1960s. On 15th March 1968 the central banks fixed price of gold at $35 per troy ounce.
Gold coated visors are used to protect the astronaut’s eyes from burning sunlight. United States government banned the individual ownership of gold on 31st December 1974. The Mars Global Surveyor was launched with the help of an on-board gold coated parabolic telescope mirror on 1996.