AU990 or G990 stands for pure gold.

AU750 or G750 stands for 18K gold.

PT990 stands for platinum. Pure platinum is a silvery white metal with luster and ductility. Its ductility is the highest among all pure metals, but its ductility is lower than that of gold.

PT950 is 95% platinum, and the color of platinum can set off the brilliance of various gems, most of which are inlaid with platinum.

Maintenance of gold and silver jewelry

1. Store platinum jewelry separately in a jewelry box or suede bag to prevent other jewelry from being scratched.

2. Please don't wear platinum jewelry when doing housework cleaning, gardening and other types of heavy work or physical activities. When wearing platinum jewelry, do not touch bleaching or irritating chemicals.

3. Clean platinum jewelry regularly. You can use jewelry cleaners sold in the market, or soak them in a solution of soap and warm water, and then gently wipe them with a soft cloth. Platinum ornaments inlaid with precious stones need to be cleaned once every six months.

4. If there are scratches visible to the naked eye, or a natural oxide layer appears on the platinum surface, take the platinum jewelry to a qualified jeweler for polishing. The scratches on platinum are only metal displacement, and the volume will not decrease.