30% to 20% off. As a well-known jewelry brand, Tiffany's value preservation rate in the second-hand market is still good. As of June 25, 2023, the three-gem necklace is not as good as gold, and the second-hand recycling price is generally around 3-7 fold. Tiffany, the queen of jewelry, is famous for her diamonds and silver products. Co was established in 1837.