Usually, the support of the earrings is made of precious metals, such as 18K gold, PT950 platinum and so on. 18K gold has good hardness and toughness, can be well fixed diamond, while its rich color, such as white, yellow, rose gold, etc., can meet the preferences of different consumers; PT950 platinum, with its pure, rare and eternal characteristics, adds a noble temperament to the earrings, and is less irritating to the skin, suitable for sensitive skin people to wear.