Jewelry School--Platinum

The most attractive aspect of platinum is its durability. Every time other types of metals are scratched or corroded, a small amount of metal is consumed. In fact, it is precisely because platinum and gold can wear out, so they need to be alloyed with other metals to be worn safely. But platinum is not the most attractive part of platinum is its durability. Every time other types of metals are scratched or corroded, a small amount of metal is consumed. In fact, it is precisely because platinum and gold can wear out, so they need to be alloyed with other metals to be worn safely. This is not the case with platinum. A scratch may leave marks on it, but this metal is so hard that it will not be chipped or cracked. We often use platinum, which is both safe and strong, to rim unbound diamonds. Platinum Overview Although platinum is the hardest metal among metals, it can still be carved and gradually shows an antique patina color. Many people prefer the unique appearance of platinum. If you like this kind of luster, the jeweler can polish your jewelry to give the original luster. At the same time, rubbing with a soft cloth can make your jewelry look new. Most platinum jewelry contains 95% platinum (referred to as pt950), mixed with 5% iridium or palladium. For the quality assurance of platinum, please look for the words 950pt or pt on it. There are also some platinum jewelry with a platinum content of 90% (referred to as pt900), mixed with 10 iridium or palladium. Platinum and gold Platinum hardness is 4-4.5, gold is 2.5; platinum density is 21.45g/cm3, gold is 19.32g/cm3; platinum melting point is 1769 degrees Celsius, gold is 1064 degrees Celsius; platinum chemical properties are stable; Hydrochloric acid, nitric acid, sulfuric acid, and organic acids act on it, which is called the 'most corrosion-resistant metalPlatinum has excellent oxidation resistance and good catalytic properties, as well as thermoelectric properties. Platinum can be stretched into a thin wire with a diameter of 0.001 mm and can be hammered into a foil with a thickness of 0.127 microns. Even if 1 gram of platinum is drawn into a 1.6-kilometer long filament, it will not break. The reserves of platinum produced in nature are much rarer than gold. According to incomplete statistics, the total reserves of platinum in the world are about 14,000 tons (the total reserves of platinum group element mineral resources are about 31,000 tons), which is only 5% of the gold reserves, and the volume is about It is 653 cubic meters, that is to say; the global platinum reserves together can only fill a full set of three-bedroom. 1 ounce of platinum needs to be extracted from dozens of tons of platinum ore for 5 months. Although there are more than 60 countries Platinum mines have been found to exist, but platinum, which accounts for 98% of the world's total reserves, is highly concentrated in South Africa and Russia. The most amazing thing is that only a handful of areas in the two countries have such rare mineral deposits. Among them, Azani, South Africa Asia’s platinum reserves are about 12,000 tons. The Telandtuwa platinum deposit is the most famous and the largest platinum deposit in the world; Russia’s platinum reserves are 1,866 tons, and have been found in the Ural placer platinum deposits weighing 8-- The natural platinum of 9 Gongting also obtained 427.5 grams of natural platinum in the primary mine. In addition, the United States, Canada and Colombia also have certain reserves. There are more than 300 tons of platinum reserves in my country, and platinum mines are mainly concentrated in the three provinces of Gansu, Yunnan and Sichuan in the west. Among the three provinces, there are three main deposits, namely Baijiazui in Jinchuan, Gansu, Jinbaoshan in Midu, Yunnan and Yangliuping, Sichuan. Among them, Baijiazui platinum reserves account for 90% of my country's total reserves. Maintenance Please use warm water and appropriate soap and a soft brush to gently scrub the platinum, so as to make your platinum jewelry glow with its former glory. Warm Reminder The cold white brilliance of platinum increases the brilliance of gems, and the hardness of platinum makes the setting of gems firmer. Prev: Pay attention to the points when wearing platinum jewelry Next: Hand processing of platinum jewelry and precautions