Common jewelry precious metal knowledge-platinum series

Platinum is one by one elegant, and the noble incarnation platinum has been particularly popular in recent years, and it has set off a wave of craze among young white-collar ladies. So, what is its charm? It lies in its rarity, purity and hardness, as well as its unique elegance. Platinum is a rarer metal than gold. Platinum is one by one elegant and noble incarnation platinum has become very popular in recent years, and it has set off a wave of craze among white-collar young ladies. So, what is its charm? It lies in its rarity, purity and hardness, as well as its unique elegance. Platinum is a rarer metal than gold, and the annual mining volume is only one twentieth of that of gold. Therefore, having platinum jewelry is naturally'valuable'. Platinum jewelry is made of extremely pure platinum (about 90%) and high-purity platinum group alloys, and will not fade even if worn frequently. At the same time, the antioxidant capacity of platinum greatly exceeds that of gold and silver, so that the natural luster of platinum is eternally new. Platinum is twice as hard as gold, so it is durable and is often used to set off gemstones. Platinum displays not only external beauty, but also a beautiful view of life. As the rarest jewelry metal in the world, it is increasingly favored by urban women. At present, there are two specifications for platinum content of jewelry in my country: 90.0% and 95.0%, which are called pt900 and pt950 jewelry. 1. The nature of platinum Platinum is usually called platinum. Melting point 1773℃, silvery white color; stable chemical properties, no color change. 1) Quantity: Platinum is difficult to mine, it is rarer than gold and rich in collection value. 2) The color is silver-white, with good luster and brightness, giving people a pure and elegant feeling. 3) Hardness one is almost the strongest among metals (Mohs hardness 44.5), not easy to wear and scratch, sturdy and durable, suitable for all kinds of decorations. 4) Corrosion resistance-strong corrosion resistance, does not chemically react with other acids and high alkalinity substances, and is not easy to oxidize and change color. 5) The melting point is 1773°C to dissolve at high temperature, and the stability is very high. 2. Reserves and distribution of platinum group metals in my country my country has proven reserves of platinum group metals more than 300 tons, of which platinum reserves account for about 2/3. 90% of these reserves are concentrated in the three provinces of Gansu, Yunnan and Sichuan, and relatively concentrated in three well-known deposits, namely, the Baijiazuizi copper-nickel mine in Jinchuan, Gansu, the Jinbaoshan copper-nickel mine in Yunnan Midu, and the platinum and palladium mine in Yangliuping, Sichuan. Copper-nickel ore. 3. The output of my country's platinum group metals At present, the output of my country's platinum group metals is very small, with an annual output of only more than 800 kilograms, 90% of which are produced in the Baijiazuizi copper-nickel mine in Gansu. Industrial and jewelry use platinum mostly depends on imports. 4. Uses of platinum group metals Platinum group metals have excellent properties such as catalysis, chemical stability, thermoelectric stability, and beautiful colors. They are widely used in automotive catalytic converters, jewelry, electronics, petroleum refining, chemistry, glass, and dentistry. And other fields. Platinum and palladium are also important metals for investment purposes. Among platinum group metals, platinum is the most widely used and the most used. The main consumption areas of platinum are automobile catalytic converter production and jewelry industry, which account for about 70% of total consumption demand. Other consumption areas are electrical and electronic industries, chemical industry, petroleum industry, glass manufacturing and investment. 5. What is the development status of China's platinum jewelry market According to statistics from the International Platinum Association (pgi), China's platinum jewelry market grew by 15% in 2001. China has become the world's largest platinum jewelry market, and the demand for platinum jewelry for jewelry has exceeded 50% of the world. Most platinum jewellery sold domestically is produced domestically. China's platinum jewellery manufacturing value reached 420 million U.S. dollars in 2000, up 23.6% from the previous year, and imported platinum products mainly from Hong Kong also approached 100 million U.S. dollars. 6. What is the difference between platinum and platinum platinum? Platinum is chemically called platinum, and its seal code is'pt', which is also the chemical symbol of platinum, which is the abbreviation of platium in English. Its elegant and simple color is innate. The content of platinum jewelry is calculated in thousandths, ptl000 means pure platinum, pt950 or pt900 means 950 and 900 parts of platinum. K platinum is a white alloy with gold as soil. For example, the alloys of gold and palladium or gold and copper-zinc are all white. The seal code'wg' is the abbreviation of'white gold' in English, meaning'white gold'. The density of platinum is higher than that of k platinum, and the weight of platinum of the same volume is higher than that of k platinum. Jewelry Next: Confessions of Platinum