Platinum (Pt) 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.

Platinum group elements, together with gold and silver, are collectively called precious metal elements in nature.

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. Generally, it is an irregular granular, dendritic, grape-like or massive aggregate. The color and stripes are silvery white to steel gray; Metallic luster, opaque. Cleavage, serrated fracture, ductile. It is a good conductor of electricity and heat.

The natural element platinum is a rare precious metal element in the earth's crust, and its symbol is Pt. The mineral name of natural platinum is natural platinum. It is a simple mineral of natural element platinum, and its chemical formula is Pt. The specific gravity of natural platinum is15.5 ~ 21.5; The refractive index is 56.5 ~ 60.0.