Also known as K platinum, it is an alloy, is made after gold and other white metal fusion. It's called WG(White Gold), which means White Gold. White K gold jewelry commonly used "18K platinum" or "14K platinum". It's essentially 18K gold, but it's white.
Symbol Pt, silver grey white, specific gravity 21.35, melting point 1769 ℃, mohs hardness 4-4.5 degrees, stable chemical properties, besides aqua regia is not affected by acid and alkali corrosion. Pure platinum is soft, adding ruthenium, rhodium, palladium and other metals will increase its hardness.
Platinum, palladium for pge deposit in the smallest two minerals and metallurgical properties of the two is quite similar, because of the same rare, similar purposes, so often do substitute each other in the various applications. Gold, platinum, palladium and silver are the only four precious metals in the international spot and futures trading market.
An alloy of platinum and other metals, such as palladium, rhodium, yttrium, ruthenium, cobalt, copper, etc. Although the hardness of pure platinum is higher than that of gold, it is not enough for inlay. It must be used with other metal alloys to make jewelry. International Platinum jewelry is marked with the words Pt, Plat or Platinum, and is represented by the word "thousand points of purity". For example, Pt900 indicates that the purity is 900‰. Common platinum jewelry labels are Pt1000, Pt950, Pt900, Pt850. Under international regulations, platinum content below pt900 cannot be called jewelry, only platinum alloy.
A member of the platinum family, silver white, symbol Pd, lighter than platinum, malleable, slightly harder than platinum, insoluble in organic acids, cold sulfuric acid or hydrochloric acid, but soluble in nitric acid and chloric acid. Under normal conditions, it is not easy to oxidize and lose luster. Jewelry world is used alone, or as a component of gold, silver, platinum alloy, to increase its hardness. Gold, palladium, K gold and platinum, palladium alloys are common on the market.
