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This is a natural white precious metal. As early as 700 BC, platinum has been shining brilliantly in the history of human civilization. In the 2000-year history of human use of platinum, it has always been considered as one of the most precious metals. In mineral classification, platinum group minerals belong to natural platinum subgroup, including natural elemental minerals such as iridium, rhodium, palladium and platinum. Platinum group minerals are all equiaxed, with few single crystals and occasionally cubic or octahedral fine crystals.