Gold has always been one of the most appreciated metals and the subject of flourishing trade worldwide. In fact, it has an intrinsic value that does not diminish with the passage of time. To recognize the authenticity of the metal there are some simple tests that can be carried out without problems, since the material has some typical characteristics. To have absolute certainty of the purity of the metal, a touchstone, black, rough and made of ceramic material, is used, to be purchased in shops specialized in goldsmith equipment. Simply rub it on the gold object so that a dark yellow stripe appears on the rub area. A few drops of a reagent product composed largely of nitric acid must be dropped onto this, in order to obtain a particular chemical reaction that certifies the purity of the gold. Instead a home technique is based on the use of a magnet to bring the gold object closer. In fact, in its natural state, the metal is not magnetic and therefore must not remain attached to the magnet. Finally, it must be borne in mind that yellow metal has a low specific weight: consequently it is very light despite the apparent size of the objects it forms. For this reason it is good to carefully evaluate the weight of an object or an ingot to evaluate its purity.
The value of the metal has been determined since ancient times for its physical characteristics, which make it suitable for a large number of uses. Pure gold is highly valued in the medical and electronic sectors because it is unassailable by acids, chemical reagents and air . For example, in dentistry it is used to create capsules and fillings, while in medicine it is used for some diagnoses. It is also the most ductile and malleable material, so much so that it can be worked in almost transparent sheets. It does not oxidize and is an excellent electrical conductor, so it can be used in microelectronics .Finally, in the aerospace industry, its ability to reflect infrared light is exploited to create reflective screens .
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Gold is characterized by having its widest use in jewelry and gold something. The 24 carat metal has a unique value all over the world, which is applied by all the markets that deal with this metal. Instead, as regards the gold used to produce goldsmiths and jewels, alloys are used. In fact, due to its great ductility, it is necessary to add alloying metals to gold: in most cases 18 karat metal is used, made up of 75% gold and the remaining part of other materials. These also determine the color and the way in which they are commercially indicated.
When you decide to sell your old gold, it is essential to compare the prices offered by the various gold shops. In fact, the gold price is always different as each commercial exercise independently fixes the reference value. The price can be 30-35% lower than the golden fixing determined for pure metal by the London Stock Exchange. In order to get the best gold price, you must first consider what the carat of the metal is. In the case of jewels, a magnifying glass is used to check the maker's stamp and title. The trademark consists of the initials of a city and a series of numbers. In general, only the title is stamped on the fake gold because the punch is obtained after the registration in the appropriate register of goldsmiths.
Then it is good to weigh the sell gold objects and jewels to be sold at a gold shop to get an idea of the value of your old gold. You have to pay attention to the jewelry that has stones set because generally the shops do not accept gems. In this case, one must contact a commercial establishment specializing in the purchase and sale of jewels and gems. Finally, the various proposals of the various shops are compared, paying attention to the services offered to customers, such as the Block price service.
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