Optimization and identification of emerald
Emerald can be said to be a relatively high-end gem because it is not only one of the world's top five gemstones, but also has a high price. For thousands of years, emerald optimization, processing, imitation, and synthetic techniques have also made emeralds Tasting has also become very technical. In general, emeralds are not suitable for gem lovers who are just getting started, because a more comprehensive evaluation of an emerald requires a lot of gem knowledge. Emerald has been optimized for a long time. The main methods are dip treatment, dye treatment and film treatment. The infusion process for emeralds has been around for a long time, and the infusion method is also diverse. In the early days, people mainly used various oils to impregnate emeralds (such as various vegetable oils, cedar oils, etc.), and try to use oils with similar refractive indices to emeralds. The oils to be infused can be divided into colored and colorless. In recent years, Canadian resin has been used for infusion. Different infusion treatments can be classified into three types according to the materials of the infusion, namely, dip colorless oil treatment, dip color oil treatment and resin filling treatment. The dip colorless oil emerald has been recognized by the international jewellery industry and consumers, and is very common in the market. This method does not change the color of the emerald itself, but also makes the emerald look better. Emerald itself has a lot of cracks and holes, and the oil can cover the existing cracks and improve the brightness and transparency of the stone. The basic principle of colored oiling is similar to that of colorless oiling. The difference is that colored oil will add dye to the injected oil. After the oil is injected into the emerald, it not only changes the purity of the emerald, but also changes the emerald itself. colour. Because this method has a chemical that greatly changes the properties of the emerald itself, it has been treated as "processing." Due to the development of emerald fissures, oil injection methods are often used to cover cracks and enhance green. When identifying, the cracks extending to the surface of the gemstone should be observed. Under the magnifying glass, the interference light will be generated by the top light. If When the gemstone is heated under the lamp, there will be oil beads flowing out, and it will glow yellow under ultraviolet light. Dyeing treatment refers to the use of chemical dyes to dye light-colored emeralds or leuco beryl dark green to achieve emerald effect. This dyed green pigment, distributed along the fracture, can be arachnoid. The coating treatment is divided into a substrate treatment and a coating treatment. The underlay treatment is at the bottom of the emerald ring, lined with a green film or green tin-platinum, inlaid in a studded setting. If the emerald jewellery is found to be fully enclosed with a metal bracket, it is suspected that the outer edge of the pavilion of the gemstone is plated with a green film. It is not easy to be detected during inspection. If the bottom is close to the surface, there may be joints at the bottom. There may be bubbles at the joints, and sometimes there will be film peeling and wrinkling. The coating treatment uses a natural leuco beryl as the core, and an emerald film is grown on the outer layer. So some people call it a regenerative emerald. Generally, the outer layer synthetic emerald is only 0.5mm thick, which is prone to cracks and is interwoven. This is a feature of coated emerald. Soaked in water or other transparent solution, the color at the corners is obviously concentrated. When viewed from the side, the multi-layer distribution phenomenon can be clearly seen. There are many methods for optimization, processing, imitation, and synthesis of emeralds, and the technical level is relatively mature. Sometimes a natural emerald and a non-natural emerald are put together and cannot be identified by the naked eye. However, the natural nature of emeralds largely determines the value of emeralds. So what should a newcomer choose when buying emeralds? It is recommended that you don't want to be cheap and cheap, and then learn more about emeralds. Finally, you should recognize a reliable and authoritative certificate when purchasing emeralds. Halter Dress Casual,Casual Bridal Dress,Flowy Dresses Casual,Casual Floral Maxi Dress Yingjia Garment Co., Ltd , https://www.yjgarments.com.jpg)