Tiffany is an American jewelry brand. On May 3rd, 2020, Tiffany ranked 1497 on Forbes Global 2000 list. Necklace product line is also very rich. Some limited edition Tiffany necklaces are very popular in the market, such as the classic four-leaf clover series, so they are highly preserved.

Van Cleef & Arpels is a French luxury brand, which belongs to Richemont Group. Van Cleef & Arpels mainly deals in jewelry, watches, perfumes and other products, among which noble series and legendary series have high value preservation, which not only have ornamental and collection value, but also can be used as a financial investment.