The Mark and Meaning of gold

1, thousands of gold： refers to the metal amount to 99.9% of the gold jewelry, engraved with 999 or thousands of gold.
2，Pure gold： refers to gold content of 99% of the gold jewelry, engraved with 99% or enough gold.
3，18K gold refers to jewelry containing 75% of the gold component, and the remaining 25% for other precious metals, engraved with 18K or 750 imprint.
4， 18K white gold that contains 75% of the gold component, the color of white gold jewelry, and the remaining 25% of the other white gold, engraved with 18K or 750 imprint.
5， Pt900 refers to containing 90% platinum, and the remaining 10% for other precious metals, platinum, palladium content of 950% platinum jewelry, printed as Pt900.
6， Pt950 that contains 95% platinum jewelry accessories, and the remaining 5% for other precious metals, imprinted as Pt950.