When selling old gold items or buying new ones in jewelry stores, questions often arise about the methods used to check the purity of gold. Doubts may arise as to whether the gold content can decrease during smelting or testing, and whether the gold is removed right before the buyer's eyes.
In reality, the process of evaluating and reusing gold jewelry involves several stages that ordinary customers may not be aware of. These stages include weighing, determining purity, separating impurities, and preparing the material for making new items. It is critically important to keep accurate records of the amount of gold at all these stages, although not all jewelers follow this practice.
The first step is weighing the item. When a customer brings in a chain, ring, bracelet, or other piece of jewelry, the jeweler uses electronic scales. However, it should be understood that the total weight of the jewelry and the weight of the pure gold in it do not match. For example, if a piece weighs 10 grams and has a 22-karat purity, it does not contain 10 grams of pure gold; theoretically, 22-karat gold contains about 91.6 percent gold, and the remainder may consist of copper, silver, or other metals.
Furthermore, the weight of stones, pearls, lacquer, or other non-gold components may require separate accounting. Therefore, one cannot conclude the payment amount solely based on the scale readings.
Various methods are used to check purity, such as X-ray fluorescence analysis (XRF) and acid testing. Using an XRF machine, information about the metals present on the surface of the jewelry can be obtained, and this test is usually conducted without damaging the item. Meanwhile, acid testing can be applied to analyze a small part of the jewelry. In some cases, the item is lightly polished for testing, which may result in a slight loss of metal, but this in itself does not prove theft of gold by the jeweler. If the seller offers to polish or test the jewelry, the customer has the right to ask about the testing method and any potential damage to the item.
Old jewelry is often subjected to melting to create new pieces. Gold melts when heated, but other metals contained within it do not automatically separate completely. The process of refining is used to purify the gold, which helps separate gold from other metals using various chemical processes. After this, the purity and weight of the gold can be checked again.
Throughout this process, tracking the amount of gold is necessary. If the jewelry initially contained 10 grams of gold, the weight of the substance obtained after melting and the amount of gold in it may differ. The reason lies in the presence of other metals in the jewelry and the possibility of separating some metals during processing. Thus, a decrease in overall weight after melting is not automatic proof of theft. The main question is comparing the initial amount of gold with the amount obtained after the procedure.
Customers most often begin to suspect fraud when the jeweler takes the jewelry for inspection or suggests performing the procedure elsewhere. The customer is not always aware of what is happening at that moment. The risk of incorrect actions can arise in several situations: incorrect indication of the jewelry's weight, failure to account for the weight of stones or other parts, understating the declared purity, or unclear information when calculating the gold value.
Under certain circumstances during the melting or cleaning of gold jewelry, a difference in weight may occur. This can be due to the presence of other metals, contaminants, soldering elements, or non-gold materials in the jewelry. Nevertheless, the gold itself does not disappear during a normal melting procedure, as it is a relatively stable metal. Therefore, if the seller claims a significant weight reduction without providing explanations, the buyer should ask questions.
It is recommended to record the weight, purity, and condition of the jewelry before melting begins. If large-scale gold refining is performed, it is reasonable to request a written report on the initial weight and the final amount of gold.
When selling old gold items or buying new ones, several important points should be considered. First and foremost, the jewelry must be weighed in the client's presence to ensure the accuracy of the scale readings. If the jewelry is adorned with stones, pearls, or other elements, the customer should ask the jeweler what their weight is and how the actual gold weight will be calculated. This will help understand how much gold is contained in the jewelry. Furthermore, full information should be requested when checking the purity of the item.