According to relevant information, there are 112 kinds of stable metal elements found on the earth, more than 2,800 kinds of nuclides, and more than 2,530 kinds of radioactive elements. Therefore, the collection is full of many unknowns, and the collectors are easy to introduce harmful substances into the room because of the singularity of the singularity.

Reported, not long ago, a university teacher in Beijing asked the environmental monitoring personnel to go to the home to test, found that the radiation level in the home is high, the culprit is actually the teacher's collection - the nautical compass. This compass contains radioactive material radium 226. In the luminous watches, old-fashioned wall clocks and compass products manufactured in the 20s and 30s of the last century, radium 226 was often used as the luminescent material of digital discs. In the 1960s, æ°š and é’·-147 were used instead. Radium 226 not only decays to produce gamma rays, but also produces alpha rays; while æ°š and é’·-147 decay produce beta rays, which can cause health damage if they are in contact with people for a long time.

In general, pure gold and sterling silver products are safe. Other jewellery will be blended with a small amount of steel, chrome, nickel and other materials during the production process, especially those that are unusually dazzling or inexpensive. Most of them are of various metals. Alloy products, complex in composition, often contain elements that are harmful to humans.

Jewelry is often in contact with the human body for a long time, so special care is required.

Jewelry currently sold on the formal market, especially high-end jewellery, is generally natural stone, and most of them are tested by relevant state departments, such as diamond jade, agate, crystal, etc. are safe. There are also gemstones that have been colored, colored or synthetic, and there are many in the flea market. Some fake gemstones have beautiful colors or luster, which may be radiated by gamma rays or neutrons, or corrosive substances. Wear these fake stones should be careful. It is understood that there is currently no residual radioactivity indicator for radiation-treated gemstones in China, and there is no uniform regulation in this regard in the world. However, most countries and regions have implemented a radiation gem radioactivity exemption limit management system, and there are specific limit requirements for some important nuclide. In general, the value of gemstones processed by conventional radiation processing in China is far below the internationally specified hazard limits.

Therefore, geeks collection enthusiasts, it is best to go to the professional organization to identify the composition and source of the collection. Generally speaking, although there are a large amount of radioactive materials in nature, only high-grade radiation materials are exploited. Other radioactive materials scattered in nature are not terrible. However, some artificial radioactive sources that are manufactured through special methods and flow into the society illegally attract collectors' attention because of their strange forms. Collectors must be cautious.

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