There are many types of gems, such as diamonds, rubies, sapphires, opals, jade, and agate. There are more varieties, earrings, pendants, pins, rings, necklaces, bracelets, etc. Each variety has a variety of styles. No matter which type of gemstone or variety you choose, you must follow the following basic principles:
1, first of all to prevent the purchase of fake goods objectively, although the gems are small, but the price is quite high. An inconspicuous gem can sometimes be compared to the price of a color TV, a car or even a Boeing machine. If you buy a fake, the loss is huge. Preventing the purchase of fake goods In addition to subjectively mastering certain theoretical knowledge and accumulating rich practical experience, it is best to go to the franchise jewellery store that is officially regulated. In order to increase corporate reputation and protect the interests of consumers, some domestic jewelry manufacturers and stores take the initiative to take measures for the majority of consumers. For example, some jewellery shops hire jewellery experts to answer questions on the spot and identify jewelry for free on the spot. Many domestic villages, including small and medium-sized villages, have such service measures.
2, carrying basic tools to identify gems, even if you go to the state-run store to buy jewelry, you can not take it lightly, in order to improve the accuracy of identification, you must carry the most basic tools, such as magnifying glass, spotlight flashlight. Carrying these tools has no difficulty for the consumer. With a magnifying glass, you can observe the level of light and the degree of damage on the surface of the gemstone, thereby determining the pros and cons of the gemstone and identifying the variety of the gemstone. It is better to use a magnifying glass for gems. It is better to use a 10x if you can prepare a 20x. The brilliance of the gemstone can be observed with a spotlight.
3, the quality of the gemstone is a very important factor. Gems have their inherent natural color. There are two issues to be aware of when viewing the color of a gemstone; do not observe the color of the gemstone under transmitted light and use it as the main color of the gemstone. Also pay attention to the influence of the light source and the environment on the color, for example, the color of the ruby ​​cannot be observed under the brown glass or under the incandescent lamp. The size of the crystals will affect the color of the gemstone. Some gemstone crystals are thicker in color, but after processing, the gemstone waste color becomes lighter and the value is reduced. This is often the case when processing aquamarine, amethyst, topaz and other raw materials. There are also some raw materials with thicker colors and low transparency. The color and transparency after processing are good, such as garnet.
4. To master the principle of judging the value and grade of gemstones, the value of waste gemstones is determined by its color, purity, processing, gem weight and other aspects. Among them, the color of the gemstones accounts for 50% of the gem quality grade, the purity is 30%, and the honing process accounts for 20%. Each part is divided into 10 grades by 110 points. For a given gem, the sum of its three quality factors is multiplied by the respective percentage, and the total quality of the gemstone is added. The indicative price of the gemstone is derived from the size (weight) and quality level of the gemstone. For the color of the gemstone, the general requirement is that the color is positive, the light is shining, bright, crystal and spirited. The texture of the gemstone is high in hardness and good in transparency. It is pure and free of impurities, no cracks and flaws. The workmanship of gem waste products should be investigated, fine, beautiful, and style to meet their own wishes. The size of the gemstone and its price ratio do not increase according to the mathematical progression, but the price increases by the geometric progression has a great span. The size also includes the thickness and size of the waste.
5, the purchase of inlaid gemstones must be extraordinarily serious and cautious. Because of the existence of the mosaic frame, the application of some methods is limited. After determining the type, it is necessary to observe whether the gemstone has undergone some treatment and whether it is a combination under high magnification.
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