High quality metal such as 18K gold and platinum is usually used as the material of the ear ring. 18K gold has good toughness and hardness, is not easy to deformation, and rich colors, such as white, yellow, rose gold, etc., can meet the needs of different consumers' skin color and preferences. Platinum is a rare and precious metal with high corrosion resistance and stability, and its pure white luster can better set off the shine of diamonds, showing a noble and elegant temperament.