Gold items should be tested before displaying them for sale. You can’t risk having sold a fake gold item and have a customer or two complaining for fake jewelry. It can happen to anyone. You can be supplied with a false gold without you knowing it but you can dodge this quandary by making sure these items you get from gold jewelry makers are authentic. Whether you are a seller or an end consumer, you should know how to distinguish between true and false gold.
Skilled people can easily spot a fake golden jewelry piece. According to these pros, something that’s too lustrous or too dull may not be true gold. But gold can come in different colors, from brilliant yellow to pale yellow. Keep in mind that gold is usually alloyed with other metals to make it more durable. Gold by itself is a weak metal that will easily be scratched but the more metal added to gold, the less valuable it becomes. Now there is a way to identify the amount of gold in rings, bracelets, pendants, necklaces, and chains. Karat is a unit of measurement especially assigned for gold to tell how much gold it contains Phân biệt vàng. A karat is actually a proportion and not the actual weight or mass of gold. It tells you how much of a piece is gold. To put it straightforwardly, a one-karat gold piece has 1/24 of it as gold. As you know, gold jewelry is available as 8, 9, 10, 12, 14, 18, 20, 22, and 24 karat pieces. An 8 karat gold contains 1/3 gold while a 24 karat piece is pure gold.
It is usually difficult to tell the karatage of different gold pieces by simply taking a look. Buyers would usually just rely on what the seller has to say. If the item is branded as 14 karat gold, typical buyers simply take it as a 14 karat gold without caring if it is truly a 14k piece. If you want to make sure, there is no better thing to do but get a gold tester to examine the piece. Nowadays, you can rely on electronic testers which give accurate readings, giving you an instant karat reading. However, electronic testers are too expensive for convenient testing. Acid testers are available at cheaper cost and are used by many jewelers and gold dealers around the world.
Acid test gives nothing short of reliable results and the principle behind it lies in the knowledge that gold is a virtually a non-reactive metal. It doesn’t react with strong acids unlike most metals, like iron, copper, and silver. Hence, acids actually determine the presence of other impurities and the rate at which a reaction takes place determines how much impurity is present, thereby, indicating the purity or the amount of gold in a sample.
An acid test kit is available as gold test kits which consist of different vials of acid solutions, a touchstone, and gold needles. There may be up to six vials of acids for testing 10k, 12k, 14k, 18k, 20k, and 24k gold although there may be variations from manufacturer to manufacturer. Gold testing acid is usually a strong acid, such as nitric acid or hydrochloric acid. That is why you have to be careful in using the acid because it can irritate or burn the skin. Some manufacturers of gold test kits provide safety gloves. You can buy your own gloves if they are not included in the kit. Anyway, you may find a touchstone in the kit and it comes handy, especially considering you don’t want to pour the acid on your test object. Instead, you rub the piece of gold to be tested on the stone tablet and put a drop of test acid on the streak to see if it is pure or not.