gold
Gold is a precious mineral that has been known for thousands of years, and it can exist freely in nature, or mixed with other elements, and it is a shiny and dense element, and one of the softer minerals, and is found in sediments of rivers and rocks. Gold maintains its value because it affects monetary policies, and the global economy often depends on gold prices, up and down. [1]
Gold is one of the most famous metals used in making jewelry, and women have used it for decoration throughout the ages, and it is manufactured and dealt with in the form of ingots, which is a mass of pure gold that is melted to complete the manufacturing process in the form of various jewelry. Gold is classified according to the caliber, and the caliber is calculated by the proportion of gold compared to the percentage of other metals that make up the jewelry; Whereas, the proportion of gold if it is 24 karat is high compared to 18 karat gold; Because the proportion of metals mixed with gold is greater, and thus the price of a gram of 24 gold is more than 18 karat gold. [2]
How to know the gold metal
The gold metal can be confirmed by: [3]
- The presence of a stamp: It is a distinctive mark on the piece of gold.
- Use of magnets: You can find out if the gold is adulterated or not by magnet. We bring the magnet closer to gold. If gold is attracted to the magnet, it contains a percentage of iron. This is one of the quick and easy ways to detect gold fraud.
- Vinegar : A piece of gold is placed in vinegar, and if the gold turns black, it is not gold. Because gold does not interact with elements and acids.
- The use of nitric acid: It has the ability to dissolve metals, but gold does not dissolve with this acid, and if it gets eroded, then it is not gold, but another metal.
- Rub a piece of gold with a ceramic plate: if it does not leave a color, it will be gold, but if it is imitation, it leaves a trace on the ceramics because gold has a bright yellow color, and when rubbing the gold piece with ceramic and the appearance of a dark yellow color, it will be evident that the piece of gold is mixed with copper , and thus the piece of gold will be Adulterated.
Uses of gold
Gold has many uses, the most important of which are: [4]
- Gold has been used for thousands of years to mint coins. Because gold has a high value, and has been used in financial transactions for a long time.
- Gold is widely used in the manufacture of electronic devices, due to the important properties it has, such as: its ability to conduct electrical current with high efficiency, and high resistance to corrosion, which makes it ideal for devices that are characterized by low voltage such as cell phones, television, and connection wires.
- Gold is used in the manufacture of computers due to its excellent conductivity.
- Gold is used in dentistry. Because it is one of the inactive elements, and because of the ease with which it can be manipulated and formed in the use of cosmetic fillings.
References
- ↑ "What is gold used for?" , gold traders , Retrieved 7-7-2018. Edited.
- ↑ "How many grams in an Ounce of gold?" , gold traders , Retrieved 7-7-2018. Edited.
- ↑ "How is gold mined?" , gold traders , Retrieved 7-7-2018. Edited.
- ↑ "What is gold used for?" , gold traders , Retrieved 7-7-2018. Edited.
