1.HW: This brand has attracted much attention because of its top gems and exquisite craftsmanship. HW's jewels are considered to have high investment and collection value, and are often sold at high prices in auctions. HW is known as the "King of Diamonds" because of its focus on creating top gems.
2. Cartier: As one of the world-famous jewelry brands, Cartier has a profound historical and cultural heritage in jewelry manufacturing. His jewelry works are regarded as the representative of classic elegance and are very popular. Cartier jewelry also has high value preservation, but it may not be as good as some specific products of HW.
Generally speaking, HW and Cartier are both high-end jewelry brands with high value preservation. Which brand is more valuable may depend on specific products, market trends, market demand and other factors.