Gold
Is a precious metal element, a bright yellow color, a soft element of low corrosion, one of the most intensive chemical elements, has been used since ancient times to the present time in the manufacture of jewelry and called yellow gold, and gold is usually mixed with copper or silver. In addition, it is used in the field of medicine in the treatment of rheumatism and osteoporosis, and the use of the gold beam in the treatment of cancer, and use of the currency industry, as used by for the Pharaohs in the manufacture of coffins, wagons and masks, there is another type of gold called white gold which is gold that mixes with tin or palladium.
Gold in nature
Gold is found in nature in the form of granules, either in rocks, in the subsoil or riverbed, and is often found with copper or lead and is mixed with it. Gold may be found mixed with other metals. These minerals are associated with the weather and this leads to the accumulation of gold in the surface sediments so that it can be easily extracted and discovered. Some rocks contain gold. They are found between rocks or in the soil and are transported by rivers or torrents to settle at the bottom of rivers or on their shores. In the form of round-shaped granules, gold has been found on the banks of rivers in California, Western Australia and the Urals, as there is a large mass-shaped Australia.
Many people search for gold for the purpose of getting rich. They search the valleys and streams, but finding it is not easy to be in the rocks or mixed with other minerals, and sometimes it is very clean and needs no treatment.
Methods of extracting gold and purifying it
Gold is discovered in tunnels or in the ground by means of modern devices, which are found hundreds of kilometers away. After drilling, it is found and transferred to the laboratories and processed chemically, or grind it into full sand and then separated from the rest of the rock types. The size of the sample and the type of minerals mixed with it and its percentage in the sample.
- The use of modern technology in separating gold from dust and other impurities by exposing it to strong water currents in the sieve, dust and impurities disappear and gold remains.
- Use mercury to separate gold by melting gold and then removing mercury from distillation.
- Cyanide, dissolving or electrolysis method.